I'm not bashing Fitz here but he didn't have the second most rushing yards in 2010. Vick, Rodgers, Freeman, and Garrard had more so he was 5th. 269 yards isn't exactly a scrambling QB. Vince Young eclipsed that number 3 out of 6 years with 2 of them in his first 2 years in the league playing 15 games. He's played in 30 games the last 4 seasons and out rushed Fitz in one of those years.
Fitz has enough arm to play in the league, but plenty means more than enough. He doesn't have more than enough.
It is close between Young and Fitz. Young is a not very bright but loaded with physical talent. Obviously Fitz has the brains, but isn't very physically gifted. They both have something to offer but neither have enough to be great.