You must not look at many game logs.
Do you even know that he splits carries?
I highly suggest you go look at the game logs of the top RBs in the league last year, at first glance, it won't look like much.
You're whole theory about YPC not meaning anything is ignorant.
yes, maybe in a game you can break off a huge run and get a boost...
But to average 5.4 ypc over 155 carries, is impressive under any circumstances.