By "hidden leader" about Kerry, I meant a quite moderate WASP, an effective governor, with big cash (thanks Heinz), with no Mexican nanny, with a very serious profile.
Well, it's simply that, during campaigns, everybody wants to see big surprises, ups and downs everyday... and, eventually, there are scarcely real surprises (Humphrey, Bill Clinton, who else?).
Ummm....Kerry isn't a WASP, and he was never a governor.
But what you're saying is that Kerry had several advantages that made it unsurprising that he would win the nomination. Except that, at the time, it was extremely surprising to the entire political class. Kerry had been all but written off as a joke candidate by December 2003. The fact that he was able to come back and win was pretty shocking at the time. To suggest otherwise is to rewrite history.
I am by no means predicting that the same is necessarily going to happen again this time. Just saying that upsets do happen, and 2004 was a pretty big one.