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@ superclown2 - what did you do to the affected sites ?
Pages were re-written wholesale, and new pages added to make the whole site more relevant to the targeted search terms
I don't think Google cares to be honest and they have already gotten a lot of bad press.
those who can adapt will carry on making money
Google made your parade in the first place.
Go back to your search results and analyse, I mean really analyse, what the sites that occupy the first ten results have in common and how they differ from yours. As, Matt Cutts said already, this algo (just like any) can be reverse engineered. Google's achilles heal is that they can't ever stop us from seeing the intricacies of what ranks and what doesn't. We can't look behind the curtain, but what they serve up infront is a great big 'show'.