I do not know that it is possible to infer much of value from match lists, beyond: 1) every program has at least some of their students go to the big-name residency programs (CHOP, BWH, UCSF, HSS, etc.); 2)individuals go into a wide variety of residency disciplines, with clusters in medicine, path, peds, and whatever happens to be the hot lifestyle residence of the moment (it was radiology & derm, then switched to anesthesiology, psych & emergency medicine); and 3) there is a certain amount of geographic inertia in matches (e.g., students at Penn are more likely to stay in Philly, while those at UW are more likely to remain in Seattle) which can be attributed to familiarity or familial biases. I would assign residency matches a very low priority among the criteria used to compare MD-PhD program, something like the 5th tie-breaker if you are trying to decide which program to attend.
