Evidence? Too short to see over the line? The best 32 QB's...28 were blah, blah, blah?
He leaves out a lot. How many QB's were smaller than 6 ft and were given a chance to start?
Doug Flutie...moderate success in Buffalo.
Joe Theisman...decent career in DC.
These are two more 6 footers that he chose to leave out. 6 ft QBs aren't recruited to big time programs and, as a result, aren't drafted in the NFL in numbers high enough to get a decent sampling. I'm willing to bet that there are more 6'5 unsuccessful NFL QB's than there are unsuccessful 6ft NFL QB's.