Reno - 11:37 pm on Nov 24, 2011 (gmt 0)
I am trying to find a common theme among sites that were penalized
That is old Google, not new Google ~ Panda was created to prevent the discovery of common themes because Google knows all too well that if that were still possible, they'd be right back where they started, which is to say, certain websites or SEOers could game the algo and undeservedly benefit. Any "common theme" that anyone thinks they discover will be countered by a thousand examples where it does not apply. In PandaWorld what works for one website will not work for another; what does not work for one website will work perfectly for another ... it's like falling down the rabbit hole, nothing is as it seems.