It is hard time for the web spammers to have pretty impact on the web spam. Google web spam leader Matt Cutts announced Penguin 4 is live now; the fourth release of penguin update is rolled out yesterday. More over 2.3 percent of English-U.S. queries, as well as non English queries get affected. This scope of penguin 4 varies by language eg. Languages with more web spam will see more impact.
Previous Penguin Updates
"Matt Cutts explained that the launch is now complete the change has also finished rolling out for other languages world-wide"