So, where was Bush slow on the draw? You said it, I didn't.
Bush was, however, slow on the draw IMO to demonstrate leadership in the form of a bullhorn moment to rally the troops down there. It wouldn't have changed very much from a logistics standpoint but it could have helped motivate workers and changed the perception a bit.
If I were to list overall blame, Bush would so be so far down the list as to not be noticed. The locals have made this much worse than it needed to be.