Playing with fire, I can agree with to an extent...
Some quick comparisons to college carries:
Williams 969 in 4 years
E Smith 700 in 3 years
R Williams 1011 in 4 years
L Tomlinson 907 in 4 years
T Barber 651 in 4 years (but only 16 as a Frosh)
W Dunn 575 in 4 years
F Taylor 537 in 4 years
It's a little tougher to compare the college stats because so many players only played a couple years... Comparatively speaking, yes DWills touches in college were significantly higher in most cases... This would put his total career carries at just under 2000, which is still relatively half of most of the 'success' backs I researched (when taking into account their college touches as well)... Emmitt is sitting north of 5k carries... Walter Payton has nearly 4k touches in the pro's alone, with no post 30 dropoff to speak of...
This has been some interesting research, to say the least... A lot more fail stories than there are success stories, I agree, but fun research all the same...
Missed a key point.
Comparing players old of eras to now is apples and oranges to a degree. Kids played careers in college years ago and don't today.
Williams played a career in college, 1000+ touches (he also had ST touches)
Today, RBs don't....MJD, Stewart, etc all are near half the workload coming into the NFL. RBs don't have the college mileage they did a decade ago