I have to agree. I don't think he's running on hot air (as some of the talking heads have complained) but that he's avoided getting bogged down in details during the speeches. Obama seems to be coming up with more of a concrete message lately. Assuming B.O. gets the Democratic nomination, Hillary's campaign will be right there w/Rudy's as "what not to do". They still don't seem to have found a message that resonates. It's a lot of the same points recycled, even though they haven't been effective.
I'm guessing here, but I think that the standing O for her closing remarks might have been for her showing a bit of her personal side, not the politician. More 'human' for lack of a better word. It did seem that her comments there at the end had a mend the fences w/the nominee feel to them.