For what it's worth, I had an interview with Chad Hennings a few years back, and in talking to him about the Super Bowls, he said that Deion did indeed divide the lockerrom, and was a distraction. Also said he was selfish, but didn't have time to get into that whole deal.
I will find the audio of it, and post the quote here in a bit.
*Edit* Here it is...
Q: The Cowboys recent signing of TO, is similar in a way to the Cowboys of your day signing Deion Sanders. What was the reaction of the players on the team, considering this was the guy who kind of ended your season in 94 with the no call PI on Irvin in the NFCC game. Was he embraced, or an outcast?
A: No, he was friends with alot of the guys. He was best buddies with Michael Irvin, so they went way back. He was a great athelete, so he was a guy there was no animosity for, he was a guy that was going to come in, and help us win that Super Bowl, SB 30, which he did, but sometimes you have to pay the pipe or two, because sometimes that mentallity, and alot of the things that be brought, over time, I think hurt the team, even if he was an immediate impact.
Q: Do you think he was mis-portrayed by the media, or was that a fair assumption?
A: Misportrayed in what way?
Q: That he was, in a way, a locker-room divider, sort to speak.
A: He wasn't- Well, he was a little bit, he was very opinionated, you know looking back on it, very selfish. I'll put it this way, he was maybe the straw that broke the camels back, because there was alot of issues building before, and there was alot of issues that his actions and conduct or whatever, I'm not blaming Deion, but it brought forth alot of pain and aingst wich the coaches and the whole system in general that things just got out of hand."
Take it for what its worth coming from two NAMED sources. I should take Ed Werders job, I name my sources