By the Final Four, yes, you've typically got the big boys.

But people watch the first weekend for the upsets -- why would the upsets matter, if you know UNC/Duke can just shake-off their Lehigh upset. That upset on Friday night no longer becomes must-see TV.

Also start running into logistics & scheduling issues. They're not playing on empty baseball fields, they're playing in multi-tenant arenas (especially in later rounds).