Google tweeted today that a new data refresh for the Panda update is currently rolling out in English, and that it affects 1.2% of queries.
New Panda data refresh rolling out today: 1.2% of English queries affected. Background: http://t.co/EMBEJqGZ
Google launched Panda in early 2011, then Penguin in the first quarter of 2012. We're still waiting to see what (if any) major algorithm update the search engine will implement in 2013.
Image: Panda Express