Russell wasn't even all that good when he played at LSU, though. That was an example of analysts and scouts hyping a guy up well beyond what his abilities warranted. LSU won then as they do now--with defense. QB didn't really matter very much so long as he didn't throw pick sixes. The other guys mentioned were very good to great players in college but busts in the pros. Not that I agree that SEC QBs are better than those of other conferences (I don't, even though I do agree that they have more of a challenge and encounter more difficulties becoming great in college against those great SEC defenses), but I don't think the Russell analogy can go very far.
Yeah the PAC 10 has had some horrible QBs. That guy Elway, he stunk. Green Bays current QB is worthless. As did Moon, Bledsoe, Aikman.
Found this interesteding tidbit when trying to find top level SEC QBs
Since 1978, SEC quarterbacks have been selected to 14 Pro Bowls. That's 13 for the Mannings, including 10 for Peyton, and one for everybody else.