Either that or you are simply penalised and will only recover when the penalty is lifted. I am hearing that some say they are seeing recoveries today. I am not.
I'm not - got the "no manual action" when I asked for reinclusion after Penguin.
jimbeetle, I've read that page before, and the spam tactics it talks about are pretty blatant (even the one it describes as "not so blatant" - I never engaged in any of those. I've gotten some suggestions from people around here about what might have caused the Penguin problems, and believe me none of it is stuff that's clearly listed in the webmaster guidelines or any pages like the one you linked. In fact, it's all stuff that many, many sites are getting away with and not just branded sites - so if they are right, then it's not just the stuff I was doing that caused the Penguin issues, but the fact that I lacked certain positive signals to outweigh them - or something like that.
That's why I think Martinibuster is right - it may be various things you did "wrong", but in some cases Penguin was just putting your page back down where Google thinks it belongs. Or a combination of both. In which case, only building positive signals is likely to help.