Hmm... I usually earned the highest grades in the classes I took -- literally. For example, in one of my general chemistry classes I ranked second out of a class of roughly 600 students at a respectable university. In my calculus class (for engineering majors), my professor congratulated me face-to-face for attaining the highest overall grade at the end of the quarter. In biology, I was emailed by one of my professors, who let me know that I had the highest grade in his class. These weren't the only instances.
Wouldn't it make sense for it to be easier to be at the top of your class in pharmacy school? In undergraduate classes, you're competing with some of the most competitive students out there -- pre-medical, engineering, etc. With all due respect to pre-pharmacy students, in pharmacy school those die-hard competitive students are gone, for the most part! I actually was ready to apply to medical school because I was confident in my academics, but medicine is not the same as pharmacy.
On average, the performance of students as a whole will be better in pharmacy school.