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europeforvisitors - 3:43 pm on Oct 18, 2007 (gmt 0)
In my opinion, that's the most likely and believable reason why junk pages may be doing well in some categories. To repeat a phrase that I used earlier, we may be seeing the storm before the calm.
As others have suggested, Google may have simply begun peeling off its filters before a major update or the deployment of new and better algorithms or filters.