What is really nice about this change to the Google algorithm is that the page rank of most blogs were not affected. It was predicted that content farms, like Demand Media, would take a hit. However, while Larry Fitzgibbon from Demand Media acknowledged the algorithm change, he indicated the company was not impacted. However, I have noticed that eHow has been movedown the page for "how to ..." queries. This is good. The eHow answers are not alway ds correct and the content is often scraped from other sites (like mine).
From the Google blog:
Many of the changes we make are so subtle that very few people notice them. But in the last day or so we launched a pretty big algorithmic improvement to our ranking—a change that noticeably impacts 11.8% of our queries . . .