Wow, that sucks when you meet someone that you admire, someone who's career you have done your best to support, and they turn out to behave like a jerk. Ken strikes me, of the 4 guys, to be the one who can be a little prickly at time (though I've never met him, so don't know why I get that impression). Rhett, Murry, and Philip seem to always have their PR faces on when they need to, Ken seems a little more genuine, like if he's in a bad mood, he's not going to be all phony and try to hide it. Maybe he was tired, having a bad day, just had a disagreement with Rhett backstage, who knows? Maybe that is his sense of humour. He answered an e-mail of mine once, and was very chatty and nice.
One of our very popular Canuck bands is Blue Rodeo, and they have 2 front men. One, Jim, is always sunny and smiling, Mr. Congeniality. The other, Greg, seems to run a little more hot and cold, just depending on his mood or whatever. Maybe Ken is like that.