I see Brutal/ Maximus/ Texas Tech's post was deleted so I won't need to go through the process of pulling out drafted RB times in the last 9 years (since 2000) to prove that at least a third of them ran 4.55 or slower. As I said the median time for "starters" is around 4.5 by my research, but players slow a little in the coming few years after their Combine performances (injuries, age, a little out of shape) and the backup average is slightly slower.
Brutal/ Texas Tech must be very frustrated about his precious top RBs performances this year. Looks like Jacob Hester measures up fine to 4 of the top 6 or 7 RBs this year (if you include Rashad Jennings as one) in 40 yard speed.
This is a big victory for us to convince DWFs of the caste system. Wells, Moreno, Greene, Jennings are considered stars; "they just play fast", "forget the 40 times" etc.
Wes Welker never was afforded that same luxury; he was cut and then almost cut again by Nick Saban even when he had shown brilliant play in training camp and pre-season that year. It's truly amazing he made it through.
Knowshon Moreno is a great player, but there are whites out there like him too! Is there a white Barry Sanders? Maybe not (although you can't prove it for sure). But there are white Pro-bowl caliber RBs; I know it from comparing film of the elite H.S prospects.