The numbers get even scarier when compared to McAllister. I don't know about carries for a loss, but I do know Success Rate. Success Rate measures how often an RB gets 40% of the necessary yardage on 1st down, 60% on 2nd down, or 100% on 3rd down- basically, a measure of how good an RB is at moving the chains. Reggie Bush ranked 39th in the league with a 43% success rate... while McAllister, running behind the exact same line, ranked 7th in the league with 53% success rate.
I have to say, I'm not that enamored with Bush. Generally there is very little learning curve at the RB position (for instance, Addai led the league in success rate last year despite being a rookie). I question just how elite of a rusher Reggie Bush is ever going to be. There's a possibility he'll really turn it around in the future, and he's always going to hold a lot of value in PPR leagues, but I'm just not as high on him as everyone else is.