My personal theory is that post-bacc friendly schools tend to be nontrad friendly and vice-versa. I'm not sure if ALL schools are equally friendly to nontrad/postbacc. I have a pet theory that non top 20 schools may be friendlier to postbacc in that they have a wider pool of candidates and they may figure, if all else is equal, why bother with letting in someone who had to reapply (doing a postbacc). I guess if it was someone who did a post-bacc because they decided on medicine, it may be different, but at the super competitive level, I can imagine some adcom thinking that given all these kids with 38 MCAT, give it to the kid who only took it once vs. the kid who had to retake it because they didnt' get in the first time.