Honestly, just from the interview trail, I am under the impression that its not MD/DO dependent at all, but is actually more dependent on the type of students that the schools go for (so the school mission). The school I will be attending has many more non-trads as a whole and some of their other requirements point to looking for more altruistic and mature people. The other school that I first mentioned definitely attracted a younger crowd of students (most were still in undergrad), the school was a lot more numbers heavy, and they definitely seemed less focused on service. So I really think where the difference is at is in the students that they look for.