While I can agree I'd prefer everyone just shut up and let their play do the talking, I don't agree that the talking...or the cause of the talking...won't translate to wins.
By putting the blame on Parcells these players removed any excuses for this season, they put themselves on the line, so they either play better or the whole world knows they were full of BS. That type on motivation has to translate to something.
Also having a gag order and an overbearing presence on them for the past 3 or 4 years gone has to be liberating for many of them. That will help too, IMO.
To have so many players talking about how different things are around and within the team, can only lead me to one conclusion...Parcells failed miserably as a coach, but did well as a GM. He brought in talent, but his ways and methods never adapted to that talent...he forced players into his schemes, and never tweaked his schemes to fit his players. The tough guy approach may have been needed early on and some players may respond well to that approach, but many more do not, and eventually it wears thin and alienates all of them.