From the original article: "Google has been working on a new penalty that targets site’s that overly optimize for search engines for the past few months.
Matt Cutts said the new over optimization penalty will be introduced into the search results in the upcoming month or next few weeks.
The purpose is to “level the playing field,” Cutts said. To give sites that have great content a better shot at ranking above sites that have content that is not as great but do a better job with SEO."
Check also out this video from Matt Cutts, dating back to 2009, and illustrating how much Google's take on this issue has profoundly changed, if not reversed altogether. http://www.youtube.com/watch?v=Bz0KQNPDUoc
Must listen-to. 8/10
Here is a full text trasncription (and the audio recording) of what Matt Cutts has exactly said: http://selnd.com/FTwher
Check also: http://www.seroundtable.com/google-over-seo-update-14887.html