JHU, Duke, and Wash U all have tons of pre-meds (20-25% of each class). One look at any list that includes those three and Penn and you can immediately identify the poster as a pre-med.
This year’s stats:
[ul][]Duke: 346 med school applicants, ~1500 seniors
[]JHU: 401 med school applicants, ~1450 seniors
[li]WUStL: 376 med school applicants, ~1740 seniors[/ul][/li]A lot of the competition depends on your major…there are far more pre-meds in biology departments than in philosophy or history. Wash U states that 75% of its biology majors are pre-med, for example.