We talk a lot about "System Quarterbacks" but don't often apply that to other positions. On the whole, Sabin's players have underperformed at the next level, particularly the RBs, Safeties, and LBs. I don't know why that is, but with few exceptions, it has pretty much been the case. Conversely, Georgia and LSU players typically exceed expectations at the next level. The Pro Bowl rosters bear that out.
Maybe the wealth and depth of talent for the Tide helps everyone look good in the Alabama system. Foster is very good. Would he be as good without Allen and Tomlinson in front of him,Williams and Anderson on either side, and against better talent? That's the question everyone is trying to answer.