2 of my websites that got badly hit in the Penguin Update. Both of them were on top 3 for many keywords, after penguin they all disappeared or were 250+. Those websites were thin websites about 1000 words content, powered by my PBN, SAPE, 301 redirects and a couple BHW web2.0 packages for diversification. I just checked 11:51 PM EST and both of them are back on 2nd or 3rd pages on almost all the keywords. WTH .
What I did after penalty? I removed all the SAPE links ( immediately), removed few PBN links and removed all the redirects (over a passage of time).
So what is this update really about?