I agree his highlight reel doesn't look all that impressive. But there has to be some reason he is so highly rated. We all agree that rankings aren't always the whole story but there has been several studies done on this site showing the highly ranked guys are usually pretty good. Take a look at his rankings:
ESPN: 4 Star – 84 rating – 1st Dual Threat QB – 28th Overall in Jr. 300
RIVALS: 4 Star – 5.9 rating – 250 Watchlist
SCOUT: 4 Star – 6th QB – 124th Overall in Scout 300
24/7: 5 Star – 98 rating – 3rd Pro QB – 13th Overall in Top247
Its not often that all 4 sites are high on someone who is not good.
Add in offers from: Arizona, ASU, Arkansas, Cal, Clemson, Florida State, Louisville, Nebraska, Ole Miss, Tennessee, UCLA and Washington. Thats pretty impressive. I know there are quite a few of spread schools here but schools like Clemson, FSU and Louisville are pass heavy.