I think the jury is out on him. All "running" QB's come out like a house on fire (Vick, Vince Young, Cam, RG3, Kaepernick, etc). They are going to "change the game". But in the second year, after defenses get an off season to scheme, they are forced to throw and that's when they are exposed as frauds.
I think Cam Newton has the best chance to succeed among all of them. And I'm still not sold on him. We shall see.
All that being said, there isn't a football executive on earth that wouldn't take Luck right now over any of them. That is without question.