Okay hatvol96, I've posted the stats and will now weigh in with my opinion.
At all positions, I do not think the Vols have lacked talent wise. However, I agree that running back and quarterback positions have not been up to the standards that UT set in the 1990's. It could be questioned whether it is the talent or the lack of developement.
Regarding running backs, the Vols made what appeared to be a great recruiting class with Jabari Davis, Derrick Tinsley, and Cedric Houston. However, none of them lived up to their billing. Looking at the coaching portion.... Randy Sanders was the RB position coach until 1999. He coached 7 of the Vols top 10 all-time leading rushers. In '97-'98 he coached Jamal Lewis, Travis Henry, and Travis Stephens. Beginning in 2002, none of the players that Sanders coached was playing at Tennessee anymore. It is also about the time that the Vols rushing production dropped significantly. Gerald Riggs was highly recruited. Did he fully develop?
Now on to quarterbacks. Chris Simms leaving the Vols at the alter may have hurt more than we know. He would have backed up Tee in 1999 and started from 2000-2002. As good as Clausen's stats were.... he is not talented enough to play in the NFL. Simms would have been a significant upgrade at that position. James Banks was a parade all-american in high school. He could not stay away from the wacky weed. I don't know what Erik Ainge's problem is.... some may be coaching.... but bad coaching can't even explain why he is playing this bad after the season he had last year (17 TDs).
And to compare receivers..... out of the group of receivers that hold most of the Vols records.... they all played with Manning...... Marcus Nash, Joey Kent, and Jermaine Copeland..... all were NFL busts.