All I would care about is:
1) Does he throw before the break?
2) Does he understand why teams have wideouts?
3) Does he release the ball in under 3 seconds?
4) Does he throw more than 4 yards when the 1st down marker is 5 yards away?
5) Does a sub 60 yard passing game and his name not appear together anywhere?
If so, great. Sign him. (Hmm, also check that he doesn't have slow eyes, let's not go back two steps!)