hopefully he'll never be quite the same - see Carson Palmer or even better, Daunte Culpepper.
another great thing about the Pats misfortune is how that team has been built. It's defense is getting very old and their window for overwhelming success is only as long as Brady's an effective qb. So 5 or 6years is probably a safe bet - rarely do players play very well into their late 30s. This is a year, if not more, lost. Will Moss still be around when he gets back, will he be as good a year older? There's a lot of questions.