Maybe for the Verbal, but definately not for the science passages. You need as much outside knowledge as you can get, both conceptual and trivial facts will be needed if you want a high score. taking the MCAT cold, i remember all the conceptual stuff but forgot all the little details and got 11s. But going back and rereading my textbooks, i get 13s on the practice tests with a lot of time left over. i'm still waiting for my August 14 scores though. but yeah, if you're aiming for higher than an 11, you'd want to know your textbooks like the back of your hand. there's always a few questions on every test that require weird esoteric information. this is what separates the 11s from the 13s.