For what it's worth, I consider it a non-story. He seems far less angry, from what I've seen so far, than Clinton. Now there was a guy with a bad temper. That face got red with barely-contained anger so often that I wish I had a dime for every time I saw it on the news alone (particularly during the Lewinsky scandal), much less the off-camera explosions from one of the world's most infamous skirt-chasers that even loyal aides have mentioned.
One can hope that if Dean lets a little yell out every now and then, it will keep him from embarrassing problems involving Gap dresses and dry-cleaning. And, as Terrance mentions, he seems quite willing and receptive to adapting to counsel to tone things down.
Some of y'all have been inquiring about Knights of the Old Republic. I have a tendency to remake characters a good bit when starting an RPG, until I have the feel down, and my pattern holds true with KotoR. I probably redid Candlekeep with my character in the first Baldur's Gate seven times. I've now remade my Scout three times, and I think I'm about to start with her for real, but I won't know for a little bit. *smiles*