As I reported last night at Search Engine Land, Penguin 2.0 / 4 is now live - this is the next generation Penguin update. As Google's Matt Cutts added, this impacts 2.3% of English queries and also impacts other languages but the percentage depends on the level of spam in those languages.
Matt said on his blog:
We started rolling out the next generation of the Penguin webspam algorithm this afternoon (May 22, 2013), and the rollout is now complete. About 2.3% of English-US queries are affected to the degree that a regular user might notice. The change has also finished rolling out for other languages world-wide. The scope of Penguin varies by language, e.g. languages with more webspam will see more impact.
This is the fourth Penguin-related launch Google has done, but because this is an updated algorithm (not just a data refresh), we’ve been referring to this change as Penguin 2.0 internally.
Here are the previous updates:
There are lots of people complaining about ranking declines and some about boosts. It is too early to tell and I do expect to post a poll next week asking you if you were impacted or not.
I deeply hope you only were positively impacted by this update.