Finally, Google’s Penguin algorithm has been updated after a long wait. Google has officially confirmed on the Google webmaster blog that they’ve started rolling out the Penguin 4.0 real-time algorithm.
Google has clearly said because this is a real-time algorithm “we’re not going to comment on future refreshes.”
As mentioned on Google Official Blog:
Penguin is now real-time. Historically, the list of sites affected by Penguin was periodically refreshed at the same time. Once a webmaster considerably improved their site and its presence on the internet, many of Google’s algorithms would take that into consideration very fast, but others, like Penguin, needed to be refreshed. With this change, Penguin’s data is refreshed in real time, so changes will be visible much faster, typically taking effect shortly after we recrawl and reindex a page. It also means we’re not going to comment on future refreshes.
Penguin is now more granular. Penguin now devalues spam by adjusting ranking based on spam signals, rather than affecting ranking of the whole site.
Drop comments if your site got affected by this update. But remember that updates like Penguin are just one of more than 200 signals Google use to determine rank.