A few things...
Good match, and epic in duration rather than quality. Despite Federer being my favourite player, I was disappointed for Roddick. He was fantastic again, and it's the best I've seen him. Ever. His ground strokes have come on so much.
Also, he didn't seem pissed off to me when he said 'but you'd already won it five times'. It was just a bit of banter between two players who get on well. If he was a little pissed off who could blame him, he'd just lost the biggest match of his career.
I also don't think he was disrespectful by leaving before Federer. From memory, that's what often happens-the winner is allowed to take the applause, and the loser makes off sharpish.
Roddick comes across as a top lad, and on this year's evidence, and player who has improved his game beyond measure. Hopefully he kicks on again and puts pressure on the top four in the next few years.