Who reads political blogs?

Here is an unscientific answer.

The median political blog reader is a 43 year old man with an annual family income of $80,000. He reads 6 blogs a day for 10 hours a week. 39% have post-graduate degrees. 70% have contributed to a campaign. 69% have bought music, 87% have bought books. 58% say blogs are "extremely useful" sources of information. 52% leave comments on other people's blogs. Just 18% of political blog readers have their own blogs. (As you'll see, that's a lot lower than in other blogospheres.) Of these, 53% blog to keep track of their own ideas, 50% to let off steam, 36% to influence public opinion.

The 10 hours a week statistic is the one I find most unbelievable.