What is this article? It's a fluff piece. It quotes maybe five people for anecdotal evidence of the mood in Iowa.
Reporters are bored with the Cain bubble and "serious" speculation about new entrants is over. They don't know what else to talk about.
(Of course, they could discuss Romney's recent foreign policy speech, or better yet, they could investigate what members of Iowa's political establishment are saying. And some are. But articles like this, which do crop up at slow points in the campaign, are unfortunately common, and aren't really worthy of much discussion or attention.)
EDIT: Looks like some potential members of "the establishment" are actually quoted in the article. But it's not explained why these individuals are especially important, or representative of any larger trend.