I think that there are small degrees of differences between what schools are interested in. Some are going to emphasize primary care, others are more research oriented, some schools have a strong infectious disease focus, others are interested in global health. That said, all medical schools in the country have the same mission, to train future physicians to deal with health issues in the US, and to that end, as much as medical education is homogenized, so is the medical admissions process. Certainly there is going to be some degree of variability as it's a subjective process, but I don't see the prototypical premed being a minority any time soon, for better or for worse.