One more thing, Vince Young lasts 5-7 years max in the NFL if he tries to run like that AND be a quarterback, playing with the MEN of the NFL is a little different than playing with the almost men of college, just that simple. I know he is big and strong but it is a different world in the NFL.
Besides, the difference between a Vince Young and a Michael Vick is that while they are both very good broken field runners and excellent scramblers, Young is a much, much, MUCH better quarterback that Vick, a better passer, more composed in the pocket, and at what, 6'5" or so, his downfield vision is vastly superior to Vick's 6'0", so my point is, while his ability to scramble and run is a tremendous option and deadly weapon to use when needed, his quarterbacking skills mean he should not need it all the time.