It depends on the player.. If the player is just simply a pocket passer, ur probably right, but if hes a Kapernick type multi-dimensional(run and pass) type guy, that defenses just don't know what hes gonna do, then u never know? Kapernick is simply so good, so early because he can do so many diffrent things, and has speed , big arm, accuracy..etc I think people get 2 caught up in certain time frames it takes a player to become good, but alot of players are simply good at the sport and can't help but be productive players, becuase there simply beter then most, and guys like Kapernick fall into that category..
I still can't believe Kapernick went when he did.. Remember how high i was on him? I could of cared less about his being in a pistol offense, as his physical gifts jumped off the screen, and u could easily tell, that he'd be good in any system, and it just so happened he played in Pistol at the time..
Eli has at least 4-6 more good/decent seasons in 'im. These days quality QBs won't stand for being drafted and "groomed" for 3-4 seasons, so, we're not even close to needing this discussion.