Haven't seen any conspiracy theorists on this board but maybe I've missed them. Just can't believe some people would even't think it, but then perhaps "think" is the problem. To use common sense to refute the theorists:
Let's start with the defense: We all know Garrett had no influence/control whatever over the defense while Wade was here. So what made the defense play lot better in this game then in any game this season. Now Pasq.... gets some credit as the new DC but, judging by some defensive player comments, they giving lot of credit of Garrett.
Now offensively: The biggest change was the improved play by the OL which at least protected Kitna but still need do better job in the running game. Doubt Garrett & HH waved a magic wand. Believe improvement came about because Cowboys worked in pads (Wednesday) for the first time this season; Players were also made accountability and our underperforming OL got the message; Kosier also returned from his injury which was a big help along with improved play on the right side of the OL.
Discipline along the OL: I may be totally wrong on this but hear me out: Remember a few games ago when Davis was benched. Initially we heard Garrett but then were told it was HH, who benched Davis--putting Holland in his place at RG. Holland played well but gave way to Davis when he (Holland) got hurt. Almost first words out of Wade's mouth was that Davis would be starting the next game. On several occasions I expressed my dismay. Holland played better then Biggs, and if healthy, should have been given the opportunity to take Biggs job from him. But no, Wade made the decision (unless Jerry intervened) to return Biggs to the starting lineup. I thought it was a dumb move cause it ensured players understand no matter how poorly they played they wouldn't lose their jobs. Whatever, but do think rest of OL thought about that situation & with Garrett/Houck now in charge of the team, they all took the message that any of them could be replaced & would be if they didn't do their job.
Finally I simply believe Garrett paid more attention to the many details which help teams win. It's tough to win in the NFL & we've been told many times that Wade wasn't interested in details. He also wasn't much interested in the offense & made no effort to intermix with them. That's in contract to Garrett who immediately started attending defensive meetings & daily talked to Pasq... about in/outs of defensive scheme which is totally opposite anything Wade ever did re offense.
Also it was posted on this board in last few days that Ware (I think?) mentioned that in practices, where mistakes were made on offense, Romo wanted to immediately have the players correct those mistakes so they wouldn't happen in the games. Again, I think it was Ware who said Wade didn't want to do that so Romo wasn't allowed; presumably that meant Garrett wasn't allowed to either.
Finally, Garrett had huge impact on offense but Wade's also lack of accountability, interests in details, etc. would have effected or caused poor play on both sides of the ball. I believe it lead to a general malaise on the team, particularly among the younger players, who often follow the lead of the vets. Also I remember reading within last day or so one of the younger defensive players commenting he had never attended a defensive meeting on the Saturday night before the game on Sunday. Apparently Garrett called for the meeting & such meetings would continue to be held nite before any game to go over plays, details, takeaways, etc.
Most conspiracy theorists will ignore anything I've said they don't like & I've probably left lo of things out but I just think such a theory makes no sense to anyone who actually spends time thinking about the situation but is also familiar with what changes Garrett instituted & which many of us would have thought should have been done all along.