GG replies to a member who suggests that webmasters who have fallen should ask themselves if they deserve their former (high) rankings. GG's reply may be interpreted as lending credence to the theory that this update addresses sites that are "over-optimized".
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That's going to be a hard wake-up call for a lot of people, Chicago. The people who urge to move to more blackhat and throwaway domains are running in the wrong direction. That's their right though.