This is not a surprise, but Comscore, backed by Gawker and Six Apart, reports that those who read blogs are wealthier, younger, and probably thinner than the rest of the world. Also, nearly a third of online Americans have visited blogs. As someone who is starting a business in the blog space, I’m pleased. But I hope we remember as we generalize about “the blogging audience” that at the end of the day, it’s not about generalizing, it’s about endemic, passionate communities….