Very interesting update! My non-pandalized site has now been pandalized to the tune of a 50% cut. I have always wondered why this site was spared, as in my mind, it did not deserve to be "up" while my main site got clobbered in February. The interesting thing is that my main site has now survived the last 2 tweaks and even gained a little in late September.
I wonder if Panda is finally catching up to all other sites that used to be untouched?