Google traffic to Demand Media sites is down 40 percent and other content farms seem to be following, according to an analysis by Experian Hitwise.  They looked at downstream traffic from Google, what sites users visit after visiting Google.com and Demand dropped from 0.57 in January to 0.34 percent last week, a 40 percent decline from the start of 2011.

That means their Panda upgrade to penalize content farms and (hopefully) make way for quality sites like ours to show up in the best results, and not just the best-SEO results, is having some impact.

Google Traffic to Demand Media Sites Down 40 Percent - Jeff Bercovici, Forbes blogging