Maybe not. I see a lot of different schools represented, and you have to figure that there are a lot of confounding variables in that data, too. On the whole, students at Ivy League schools are more likely to present high MCAT scores than students at "lower ranked" schools - there is a well-studied correlation of SAT scores with MCAT scores. Plus, (most) Ivies have a bit more 'grade inflation' than many other schools. And who's to say that the Ivies don't generate or attract more premeds than other schools?
My point is, there's probably more to the story than just numbers. Maybe if you and some kid from Yale have identical stats, recs, etc. he gets in over you based on the strength of his school, but in general, if you're qualified, you'll get in.
