This isn't a particularly noteworthy attribute of Less Wrong discussion; most groups below a certain size will find it interesting when a major media outlet talks about them. I'm sure that the excellent people over at http://www.clown-forum.com/ would be just as chatty if they got an article.

I suppose you could say that it gives journalists an incentive to write about the groups below that population threshold that are likely to generate general interest among the larger set of readers. But that's just the trivial result in which we have invented the human interest story.