JJ wants Clinton to win because she will be easy to defeat in November. Clay has no excuse to support her, except that he's a white Southerner (I don't know why they don't like Obama, its not just because of his race, its probably other issues, she's always done well with poor people too.)
No, sorry, I've thought she would be the likely winner after NH. I do thing Obama is over-hyped (and I actually think that's hurting him).
There have to be more reasons than a feeling that you think he is over-hyped, which he may be at this point, its hard to say. When someone has momentum, its can seem the same as hype.