tedster - 5:43 pm on Jan 21, 2011 (gmt 0)
Here's another key sentence:
As "pure webspam" has decreased over time, attention has shifted instead to "content farms," which are sites with shallow or low-quality content. In 2010, we launched two major algorithmic changes focused on low-quality sites. Nonetheless, we hear the feedback from the web loud and clear: people are asking for even stronger action on content farms...
As with any new algo effort, there might be false positives. We may already have heard some reports about that kind of thing here.