it all depends at what exactly you are looking at on predents.com.
Predents.com has two sets of numbers. When you go to a school webpage on predents it lists a bunch of into near the top half of the screen. That stuff is two years old and has been taken straight from the ADEA guid to dental school information book. So that info is for the class of 2004 or 2005. The academic average listed there is the average for all the students who got accepted to Tufts for the class of 2004.
When you go a little further down, then you see the information for Predents.com users. These users usually represent a very small minority of the students applying and generally have slightly high stats than the averages. Under "interview" it has 22 for the academic average. and that is just for people signed up for predents.com.
if you want to compare just predents.com from last year vs. this year, there is a feature in the upper left corner that allows you to look at stats for last years class on Predents.com. Click 2006, and you'll see that last year the average for interviewing students was 20.92, which isn't that much lower considering Tufts hasn't finished interviewing students yet, and students with lower DAT scores sometimes don't get the earlier interview calls.
