When 100% Easley was the quickest. His burst off the snap was unmatched.
Donald is the best of both worlds with a very good burst but also with the strength to bull rush as well.
In 2012 Sutton had a good, not great, burst. He knew how to shoot gaps and penetrate though and was in the backfield a ton. I just worry about what he will translate to in the nfl being small and not overly quick or strong.
Against the run I would say Donald is #1 followed by Easley and then Sutton.