I am interested in responses to this topic as well. I have decided to take DS (4 years, 2 months) for testing at Vanderbilt which is a couple of hours away. From the description of the test that was given to me by the educational psychologist, I am pretty sure it is the KBIT-2. I am interested in getting DS' results, and I was told that Vanderbilt will accept this test for admittance into their program (which begins in kindergarten).