Cam Newton: "Nobody has my lack of accuracy."
He basically made his GM go get two 7 foot recievers with a 9 mile catch radius, just so they can insure him actually making some throws.
I jest, of course, but he's not proven much apart from being a talented athlete. He's got the tools, but he's not been consistent enough to put him in any kind of conversation about anything.
I think with young(-ish) QB's I always try to look at what they'll be in 3-5 years. With Luck I expect a Superbowl, with RGIII I expect a back up role at best. Cam Newton though? No clue. Would not surprise me to see him win a Superbowl in that time, but also would not surprise me if he never put it fully together and had a uneventful career always being that potentially good guy without delivering.