Put aside sour grapes and wonder. Why is it that some candidate like Duncan Hunter doesn't have smart money backing him. I don't know the answer to that. All I know is that his contacts in the defense industry in CA could fund one of these campaigns any day of the week that they chose to. So, I wonder. What do they know about him that I don't know?
I think you hit the nail on the head. This shows Romney can win even at the grassroots conservative level, in what is a change from his usual 'big city republican' appeal in Massachutes. I think big money backers will see him and his organization as tested now, and provide heavier funding.
I think the issue with Hunter amongst the big money backers like you said the defense industry. It might be fear of what would happen with his get tough trade policies. Or it might simply be Duncan while great ideologically isn't that great organizationally.