This is exactly what my knock on Bush has always been. Look at the stats from these past two games. Tonight, his biggest run was for 9 yards and yet he ended up with a total of 7 yards rushing. That means if you total up all his other runs, they come out to -2 yards. That's not good.
At the very, absolute best, I expect him to be a cheap imitation of Barry Sanders who needs a lot of touches that go for between -2 to 2 yards and then finally, on his 35th touch, when the game is already lost, he finally breaks an amazing run and ends up with over a hundred yards for the game. He'll be exciting to watch but he'll kill so many drives that it will be very hard to win with him. And when it comes time for the playoffs, he'll disappear.
And that's the very best I'd expect from him.
Obviously, I don't expect to regret this pick at all.