How much does hand vs electronic time matter anyway? I think if he is an instinctive patience runner who waits for his blockers or who can bust with sheer speed it does not matter to me.
He just need to make people miss and play hard enough that he becomes a threat that will occupy defenses so that other play options open up.
I think coaches look for certain things other than raw talent which he obviously has. Otherwise, PJ Fleck wouldn't have offered so quickly. Other traits and attributes like leadership qualities, the burning desire to succeed, character, attitude, etc... are equally important.
Then there are kids like Logan Richter that will make coaches fall out of their seats when they see them pass by. You offer him on the spot and you develop him. He passes the eye test immediately.
Some players highly rated or not may be busts. Then, there are players who are late bloomers who end up as pleasant surprises.