I think a more accurate analysis is as follows: The reason more people update statuses (Facebook, Twitter, etc) than maintain blogs is because there is little

I think a more accurate analysis is as follows: The reason more people update statuses (Facebook, Twitter, etc) than maintain blogs is because there is little guilt in slacking on the former. If you fail to blog for a week you typically hate yourself. If you fail to tweet for a week you think nothing of it. People prefer things that don't make them hate themselves.