One very important question Theistic Evolutionists and the like must answer is simply "why"? Why did God, in their view, take so long to create the heavens and the earth? This is an important question, because everything God does has a purpose. God is not capricious, or chaotic. God does not do anything on a whim, He is cool and calculated. His actions are not arbitrary, He has reason for everything He does.
Now, I'm not saying that if Theistic Evolutionists cannot answer this question, therefore Theistic Evolution is wrong. It would be the argument from ignorance to say "I don't understand why God would use Evolution or create over millions of years, therefore God did not use Evolution to create over millions of years". However, since Biblical Creationists can explain why God acted the way the Bible says He acted, and the answer is far greater than the senseless bloodshed Old Earthers are required to believe in, we have a significant advantage over them.
As Biblical Creationism is the only view that is fully supported by the text of scripture (and indeed, this is because it is the only one that comes naturally from the scripture), Theistic Evolutionists and their ilk rarely, if ever, even quote scripture. They always defend their views using some external source, whether it's secular pseudoscience, or some ancient writer who also didn't take a straight forward view of Genesis (most commonly Augustine, see here for my rebuttal to a common misquote from him). There is, however, one scripture that is abused by Old Earthers so often, I imagine some of them wear pyjamas decorated with it.
That verse is, of course, 2 Peter 3:8: "But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day." Old Earthers LOVE this verse, because it allows them to invent a concept called a "God day". That is, God does not experience time the way we do, and so when He says "day", that's open for interpretation. Except, of course, when it comes to everywhere else in the Bible where we find the word "day". This only applies to Genesis. Not even Hugh Ross would dare say that when Jesus rose on the third day, He is actually still in His tomb now, because it has been less than 3,000 years since His crucifixion.
Now, the irony of Old Earthers misquoting this verse is that the chapter itself actually affirms the truth of Genesis. Verses 5-7 tell us "For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: Whereby the world that then was, being overflowed with water, perished: But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men." (Emphasis mine). And so we see that actually, the promise of a future judgement depends on the literal nature of the past judgement, and even on the initial creation by the word of God out of water.
So, already, Old Earthers have a problem. One of their favorite misquoted verses exists in a chapter that basically says not to listen to them, because they're deliberately ignorant. But 2 Peter 3 also tells us why God is taking so long: Patience. There are people out there right now who, given another day, another week, another year, might get saved. God doesn't want anyone to perish, yet if He comes back to judge now, someone will be judged in a way He would rather them not be. So, God can afford to wait to return, and so He will.
So that's why He's taking so long to come back, but what about how long He chose to create? This is where another Old Earth talking point gets demolished. Are Creationists putting God in a box for thinking He couldn't have used Evolution, or taken millions of years? See here for my answer to "could God have used Evolution". But this particular talking point is destroyed by reversing it. Could God have done it in 6 days? Theoretically, God could have chosen to wait millions of years, but He could also have chosen to do it in literally no time at all. If God had wanted, everything that happened in the Genesis creation week could have been done in the blink of an eye. Therefore, both Biblical Creationists and Theistic Evolutionists are asking the question "why did God take so long"? The difference is, Biblical Creationists have a very solid answer. Theistic Evolutionists don't.
First, let us turn to Exodus 20:11: "For in six days the Lord made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the Lord blessed the sabbath day, and hallowed it." This verse has double relevance to this discussion. First, it establishes that creation week is literal. The Jews worked for 6 days and rested on the 7th because God worked for 6 days and rested on the 7th. This verse just would not make sense if Old Earthers are correct.
But it also gives us the first step to establishing why God took 6 days. As it turns out, the Sabbath is quite well discussed in the Bible. One example of where it pops up in the New Testament is when Jesus was accused of breaking it at the end of Mark 2. He and His disciples were in a grain field, and the disciples were hungry, so they ate. The Pharisees became indignant and challenged Jesus: "why do they on the sabbath day that which is not lawful?" And Jesus answered in verses 27-28 "The sabbath was made for man, and not man for the sabbath: Therefore the Son of man is Lord also of the sabbath."
Ok, so, the Sabbath was made for man, according to none other than the Lord of the Sabbath. And of course, setting discussions of the Trinity aside for now, suffice to say the same Lord of the Sabbath speaking in this verse just happens to be the same Lord who spoke the words "let there be light", and so on. Now, if the Sabbath was made for man, and the Sabbath is based on creation week, we can soundly conclude that God took 6 days to create and rested on the 7th because He wanted us to work for 6 days and rest on the 7th. Thus, Biblical Creationists have a sound reason for God taking as long as the scripture says He did. Theistic Evolutionists, by contrast, have no reason for God to have taken as long as scripture does not say He did.
Theistic Evolution and the like are senseless philosophies. They are contrary to scripture, they are contrary to science, they are contrary to recorded history, they are contrary to all logic and reason. There is just no reason for any old earth philosophy to exist. In a secular context, it makes some amount of sense. If you believe some natural force explains our origins, it's only natural to believe this happened slowly over time. But if you claim to be a CHRIST-ian, no other view of origins than the one Christ preached is logically consistent for you. Therefore, regardless of the many incoherent creation myths that stream from the mouths of unbelievers, let us rebuke them with sound arguments. As Christians, let the spirit of truth reign supreme in our hearts, our souls, and our minds. If you do not understand the Bible, that does not mean the Bible is wrong, it means you are either/both spiritually or/and intellectually immature. In this case, do as a wise child does: Sit down and listen to your teacher.