I wondered this a while back too. Last year I had a roommate that was applying to medschool with a poor MCAT, but a very high MCAT writing score. I looked around for a board to ask if anyone knew which schools cared more about that than others. (I figured that perhaps like how Boalt, UCLA, all the California law schools really, place more emphasis on the GPA than the LSAT, maybe some schools were known for placing more emphasis on one area of the MCAT than the others). The good news is that I found a board. The bad news is that noone bothered to even answer my quetion. Not even an "I dunno." And as far as a place that has a database of applicants, numbers, and results, I never saw anything.
But if you find something like this, or if you can answer my year old question for me, I'd appreciate it.
Thanks, and sorry I couldn't be more helpful.