http://apprising.org/2010/07/13/tim-keller-doesnt-believe-in-young-earth-or-six-24-hour-day-creation/
This blog has more detail on this issue by referencing the views from Dr. John Piper, Tim Keller, John McArther, and John Morris.
John Piper
we should teach that man had his beginning not millions of years ago but within the scope of the biblical genealogies. Those genealogies are tight at about 6,000 years and loose at maybe 10 or 15,000.
John MacArthur
http://www.gty.org/Resources/Sermons/90-359_The-Theology-of-Creation
“Do you believe completely in the literal interpretation of Genesis chapter 1 and chapter 2?” Ask them that. There are 106 Christian colleges in what is called “The Christian College Coalition.” Five would say yes to that. A hundred and one would say no. Just exactly [what] does Genesis 1 and 2 mean then if it doesn’t mean what it says which even a child can understand, then how are we to know what it means? And at what point can we trust anything that the Bible says?
The answer to the question, “What is your view of Genesis 1 and 2?” will reveal the attitude of any organization, any ministry toward Scripture. And if they believe that Scripture is inerrant and authoritative and complete, you’ll get the right answer. If you get the wrong answer, then they have a weak view of Scripture. And if they reject Genesis 1 and 2, then you can ask them the other question that I posed a little while ago, “Just exactly where do you start believing the Bible?”
Tim Keller
http://www.edstetzer.com/2008/02/tim_keller_on_evolution_and_ot.html
I believe in the historicity of Gen 1-11 and Adam and Eve and I don’t believe in young earth-creation or six 24-hour day creation, but, as far as she’s concerned, that means I believe somewhat in evolution. She’s not used to the fine distinctions on these things we make inside the church.
John Morris
The main reason for believing in the young earth is that the earth is young! The Bible tells us so, and the weight of the scientific evidence points to a young earth.all the evidence is compatible with the young earth doctrine, with far greater evidence supporting a young earth than an old earth