Not sure what your point here is, but if it is what I think it is, you are wrong. This clearly shows that the Bucs split rushing snaps better than the Cowboys. Barber took nearly 2/3rd of all of our rushing snaps.
COWBOYS
Marion Barber - 238 carries, 885 yards, 7 TD
Felix Jones - 30 carries, 226 yards, 3 TD
Tashard Choice - 92 carries, 472 yards, 2 TD
Total - 360 yards, 1,563 yards, 12 TD
BUCS
Cadillac Williams - 63 carries, 233 yards, 4 TD
Derrick Ward - 182 carries, 1,025 yards, 2 TD
Earnest Graham - 132 carries, 563 yards, 4TD
Total - 377 carries, 1,821 yards, 10 TD
I agree that all 3 of our backs are good, but Barber got hurt last year, Jones got hurt last year and hasn't really proved that he can do it for a whole year. Choice is still a backup...
That all being said. I'd still prefer our backs to theirs, but don't think for a second that they are heads and shoulders above the other teams.