[lmatth]

I think the main reason is his versatility. He can do SOOOO many things on the field. Young opens up that Tenn. offense in several ways, but having Bush coming out of the backfield allows the Saints to constantly disguise the offense, thus making the play calling options limitless. The offense that the Saints have put together late in the season is due to the fact that they are a double threat (running and passing) and the passing game isn't isolated to a short game / big play game. They can control all aspects of the field.