Maybe they can, or maybe he has an incorrectable flaw. He seems to have an issue processing information as quickly as is required, when it comes to reads, timing, and progressions. Maybe the "light" comes on, maybe it doesn't. Maybe he comes out and lights up the league next year, but I'm not counting on it. I have no doubt, that in the right situation, he can be sevicable, but some flaws are simply not correctable, without years of repitition in a given system. Take RTs pocket awareness issues. Doomed him to a ceiling of mediocrity.
That's why i don't discount the fans that say keep taking QBs until you hit. I hate to use picks, willy nilly on project QBs, but the arguement has merit. When you find that guy, and you put him in a good situation, its pay dirt.