He's come out looking like a strong, decisive leader; compared to Gordon Brown who keeps calling for independent inquiries and just generally dithering about.
Dave's 'message to the nation' is also good. Saying sorry for the mistakes straight off the bat rather than trying to weasel his way out of it: http://www.conservatives.com/Video/Conservatives_TV.aspx?id=d8d1827f-3459-4067-83e3-5fdf9a90665e
It's a coming-of-age moment I think. He's shown real strength of character.