I really don't know what drives traffic to blogs. I know that its important to post regularly, but oftentimes, I'll spend hours on a post, researching, double checking my facts and figures, and writing up what I feel is a thoughtful piece, and traffic hovers around 50 page views. Other times I'll throw out a one or two liner with a link, and I get hundreds of visitors.
Then again, it could just be confirmation bias.