Google Algorithm Update 2014 - Rolling Out Panda 4.0 Now

Google’s Matt Cutts announced on Twitter that they have released version 4.0 of the Google Panda algorithm.
Google’s Panda algorithm is designed to prevent sites with poor quality content from working their way into Google’s top search results.
But didn’t Google stop updating us on Panda refreshes and updates since they are monthly rolling updates? Yes, but this is a bigger update.
Panda 4.0 must be a major update to the actual algorithm versus just a data refresh. Meaning, Google has made changes to how Panda identifies sites and has released a new version of the algorithm today.
Is this the softer and gentler Panda algorithm? From talking to Google, it sounds like this update will be gentler for some sites, and lay the groundwork for future changes in that direction.
Google told us that Panda 4.0 affects different languages to different degrees. In English for example, the impact is ~7.5% of queries that are affected to a degree that a regular user might notice.
Source : http://searchengineland.com/google-begins-rolling-panda-4-0-now-192043