My method sucks, but I think it's better than nothing...
What I do is basically count up the number of competitive specialties matched into (Rads, Optho, Anesthesiology, Derm, Urology, Rads, Ortho, etc.), compare it with the overall number of students in the class, and then take a brief look at the places matched into for these specialties. Good ratio of students that matched into these specialties/total students = +
Ofcourse, not everyone actually wants to go into a competitive specialty, so I and then look in-depth at the places matched into for less competitive specialties and see how many big-name schools I recognize (e.g. Duke, NYU, Harvard, JHU, etc.). Lots of big name schools = + again.
Not a good method? Oh well, I'm sure half of you do the same
.