They haven't.
It's absolutely amazing to me that a large group of atleast somewhat intelligent people can come together a go on about a such general reach of a statement made by the media when so much evidence (yes, visual evidence that you can see in each game of team comradery) says this is not so. Sure JP might be a cocky guy, but he is surely a good teammate. To boot, this rumor was first heard from the likes of Pro football talk if you trace it back. Not to sound like TD here but it's almost embarrasing to think that all of you would get so involved in what is utter nonsense.