1. 7-9 > 0-16
I'm not sure how long you've been a Bills fan, but it really sucks to have a real loser, and I'd much rather have a team who can win most games than a team that has no hope. It hurts more when they do end up being eliminated from playoff contention, but that's because you still care. Try being a Lions fan for a while and see if you still think there's no difference.
2. Fact: Dick Jauron has not won enough here.
That does not mean he "has proven he can't win". He won 13 games and was coach of the year less than a decade ago. I'm not saying he will turn things around; I do think he has a better chance with this team, this year, than anyone else you could get to come here right now, especially if we end up firing our head coach after one game.
We need to be proactive, not reactive. In other words, a decision should be made based on what the outcome might be, not because of what has happened in the past. In my opinion, the likely outcome of keeping him (through this year at least) is far more desirable than the likely outcome if he were to be fired today.