I thought that the 'rockstar' candidates seemed pretty cocky, pretty much rolling right on over the 'time' notification from the network. The 'fringier' candidates seemed kind of cowed like they were 'gee, I'm stopping on time, do I get a gold star for it?' or something like that.
Re HillarObama, Obama said something to the effect 'if you don't think I'm black, come watch me hail a cab in Manhattan'. Hillary's response was not quite as catchy but perhaps more diplomatic, along the lines of "I don't have a choice about running as a woman"
Afterwards, the bit of the commentary I caught they were going 'Obama meets with Axis of Evil, Hillary Doesn't' as if it were a big deal, while going on w/ that, they cut the sections on health care and education short and none of the candidates went a long way to differentiate themselves in a good way. Mostly 'damn, Biden really is a character...and damn, Kucinich is a character and damn, that wacky dude from Alaska is a character too...' w/ little opportunity for substance. Neither Obama nor Hillary nor Edwards seemed to come up with a clever plan when they were going past 'time', they seemed to be stumping w/ "I have a vision...' sorts of stuff.
Of course, I still like all 8 of them better than any Republican.