In his show Miles stated that he would like to identify the top two backs for a "one-two punch" with a third back for special situations, aka 3rd down back.
LSU used Harvey Williams, Sammy Martin and Eddie Fuller back in the 80's. Usually when they talk about backs who need 15-20 carries to be effective, they're talking about power runners who wear defenses down, i.e. Ally Broussard. A speed guy can light you up at any time, like JV did on the first play against OU.
I heard some LSU fan, yesterday, on a Knoxville radio program describing Scott as having "blazing speed". His career is still young but I have not seen him show blazing speed. I hope he proves that I am in error, this weekend.