See article above or on Tucson.com. Looks like the Arizona Wildcats run a mile every year and the fastest is a 5:06 by J Cruz's son, second fastest being 5:17 by their last two point guards. Of note they had a 7 footer run 5:41 last year which is pretty impressive.
Given how much discussion there is on this on here thought it was interesting. Implies to me that there probably are some guards in the NCAA/NBA who could break 5 but not many.