Penguin 2 Affects a Spam Anchor Text
Penguin 2.0 is not just Data refresh, It will specifically target black hat spam in much higher frequency than previous Penguin updates. From Penguin update Google has increasingly applied stricter standard on manipulative link profiles. The Web marketing agency also suggested that sites that have been badly hit with this update had too much exact match anchor text and link profiles that appeared unnatural to Google. There is no easy way or tool to know what kind of spam has been targeted by Penguin 2.0. Defnately this updates will make a difference with the quality of the search results and as decreases the spam results.