I think JR can run faster but the number of guys who are said to "run in the 4.3's" is much, much larger than the number of guys who can actually run an electronically timed 4.3-something forty. These guys are some of the fastest guys in the college game, have been training for this exact drill for over two months, and still a relative few can break 4.4. Anything under 4.5 will allow a guy to do about anything he needs to do on a football field in a game. It's still football, not track. Out of the dozen or so guys that have run sub 4.3, only a couple ended up being really good NFL players.