Google is Planning to Penalize Overly Optimized Sites
Found on TekGoblin on Sunday, 18 March 2012
Basically there are sites out there that completely focus their efforts on SEO and not content and those results would rank higher than sites that don’t focus on SEO.
The search engine at Google is about to go through a major overhaul and de-prioritizing sites with heavy SEO is just a small part in the big picture to bring better search results. The changes to the search engine will be coming in the next few months.
Good decision. It's getting annoying to have the first page of your search results plastered with heavily optimized sites. Webmasters need to focus on the content and quality instead of some SEO wizardry.