I would go so far as to call Tim Tebow one of the greatest college football players ever. But I don't think he will have a good pro career. You can't run that easily on QB sneaks in the NFL, and no team wants their QB taking hits either. He lacks polish as a passer and just doesn't have "it" when it comes to passing the ball. He is a fantastic leader, fierce competitor and is a good person, but NFL QBs have to first and formost be proficient passers.
I hope I'm wrong.