So Panda can be turned off despite what they said. So surprised, NOT.
Just in time for Christmas we'll get another update. I publicly guess that Google will win this update :)!
As for bounce rate, it mostly depends on what traffic Google /Bing brings you. On my site sometimes it varies by 20-30% and there isn't a damn thing I can do.
It looks like my site has taken a hit on the high traffic terms that it is perfect for and a boost on hundreds of low traffic terms for which it is not very helpful to visitors.
Those terms are being sent to 'good sites'
If Panda is what I think it is (see previous post) then there is a fatal flaw in the whole concept. That is it neglects the direct effect that Google will have on its own results. If it rewards sites that fit the Panda model they will become a stronger fit to the Panda model and the whole thing becomes self fulfilling. As others have said Google just becomes a directory of sites that have been put their by the Panda model that are sustained by their fit to the Panda model that is fed by Google.
I believe that too. Sites have been left to die since worst traffic bring you worst user engagement, and no sane person can say that Google didn't anticipate this.