I know there was an old thread started by someone here saying they are seeing a lot of web directories are no longer indexed by google. I think it was a good discussion and it was locked for some reason.
The reason why I want to get back into that is because there is in fact a lot of de-indexing going on in regards to penguin. This is beyond just web directories, but this goes on a page by page level.
I only have 1 client that has a penguin related issue and all of his links are from a link wheel scheme. All of those pages are no longer indexed in google. When I say pages, I mean the pages were once indexed in google and now they are not. The website in some instances is still indexed.
Unfortunately, he did the bulk of his link building through a company and all of his links are of the link wheel variety. So naturally its as if every one of his links are no longer there. Not a penalty, just a loss of links.
I think this is a good move by google. Get the spam out of the index completely. Is anyone else seeing this? I have limited data to go on since none of my personal or other clients sites were effected by penguin.
Check your backlinks if you were hit by google. See if the pages your links were on are still indexed by G.