4. Not a level playing field. Duke's semester ends almost a month before Maryland's. A bball player at Duke only has to go to classes for another week or two after the final four and can still go to the pro combines. Maryland a kid has to go to class for another 5 or 6 weeks while considering how to prepare for the combines. I don't know when UNC's spring semester ends, but Maryland is later than most.
I'll have to remember this one as an excuse for Ohio State. They're on the quarter system, which means that there's nearly a full quarter (8 or 9 weeks actually) of classes after the tournament ends.