You forgot Armenti Edwards who's 5'11" but yeah, they are the shorter bunch at the combine.
But while height is one of the most coveted attributes NFL execs want in their QB, there has been plenty of evidence to show that it is not necessary for success. Here's a link talking about Hall and how he's been training with his uncle getting ready for the draft.
http://startelegramsports.typepad.com/cowboys/ He is quoted as saying that
"The best thing that happened to me this year was Drew Brees."The article got one thing wrong though. Way wrong. --->
"Hall broke the BYU record for passing yards, which was set by former Heisman Trophy winner Ty Detmer, with 11,365 yards in his three-year college career." Uh, yeah Ty still had just a few more yards than Max. Like 3,666 more yards. Mad did break John Beck's MWC record for most yards and jumped to second place on BYU's all-time list but came nowhere near Detmer's mark.