Blogging has a glass ceiling?

It's been reported that while a roughly comparable number of men and women blog, blogs maintained by women apparently attract less attention. Some women believe that it's because people tend to take a woman's blog less seriously than that of a man. I have to wonder if this is really the case. In most of the blogs I read and comment on, I don't even know if the writer is a man or a woman, and frankly, I don't care. For that matter, I often don't even have a clue about a writer's race, age, job, etc. Am I an anomaly? Are there really so many people who read blogs depending on the writer's gender?