I took Luck. I think Griffin is fantastic. He's not Newton, Tebow or Vick. He can learn and execute a playbook. He doesn't make dumbass decision after dumbass decision. He's not Vick or Tebow who looks at the first read and then for a place to run. But part of the problem is that he's not Newton or Tebow. He's not big enough to take the beating when he does run. He's more Vick-size. And, as you know, he hasn't held up well under the pounding.
If he become McNabb, runs early in his career and less as it goes on, he loses value. While there's no way to know, I think Luck has a longer, more productive career simply because he stays on the field.