SEO's Unimpressed with Google Penguin
Google began rolling out Penguin 3.0 last Friday night and it is expected to continue for the next several weeks.
There was some initial confusion about whether more signals were updated in the algorithm or if it was simply a data refresh but more information is finally emerging.
As the volume of conversations in the search engines forums about the refresh rose over the weekend, with seemingly as many increases in rankings as decreases, Google's Pierre Far verified on Google+ that it was, in fact, a refresh and that fewer than 1% of queries in US English search results were affected. Far did indicate however that this was a worldwide rollout so expect Penguin chatter to continue for the next month or so.
Far also put to rest any speculation that Penguin 3.0 was an update of the algorithm. "This refresh helps sites that have already cleaned up the webspam signals discovered in the previous Penguin iteration, an demotes sites with newly-discovered spam."
Many search engine optimization professionals were expecting a deeper rewrite of the algorithm (which might have added more signals) but as it stands the refreshed index (over one year has passed since the last refresh) seems to be the only news of note about Google Penguin 3.0, leaving many wholly unimpressed.