I think next week will be a big test. I have believed for a long time now that we can win games with DB but I am still skeptical that we can be a true winning team. Mistakes like he made early in yesterday's game can, at times, dig us a hole from which we can't climb out. When defenses put together a smart game plan against Drew (we haven't seen one of those in a few weeks, but we will this week), we either hang on for dear life while Willis begins to wear them down or Drew blows it and the game gets ugly. It seems to me that we still aren't all that patient with our running game yet.
Another reason we've done well is Lee Evans. He has made some big catches early in games before we are in "Willis mode". Without those, things could be different. I think the Bills are right now one of about 4-5 teams in the league that could beat anyone or get beat by (just about) anyone based on a few plays early in games that set a tone.