Well, from the opponent's perspective, I didn't even bat an eye at the quick handshake, and I didn't think it was disrespectful toward Beamer. For one thing, Kiffin's had just watched his team self-destruct in the second half, giving up half as many sacks in one game as they had the entire season and giving up 20 unanswered points. He was probably a little hot under the collar. And there is zero history between Lane Kiffin and Frank Beamer. This might well be the one and only time those two coaches face each other their entire tenure.
Before I read this thread, the handshake that caught my attention was Lane making sure to shake Tyrod's hand as they passed on the field. I thought that was pretty classy, taking a moment to shake hands with our quarterback.
My opinion of Lane Kiffin remains unchanged: he's a little cocky, but welcome to the SEC...