philipboyle - 11:58 am on Dec 18, 2012 (gmt 0)
My website was hit by a Panda update on November 21st, dropping around 12% of our total traffic. It is the first time it has been negatively affected by a Panda or Penguin update.
Last Wednesday, December 12th, I saw a very noticeable recovery. We also saw a lot of ranking changes in our weekly SEOMoz report on Thursday which would seem to back this up.
No confirmation of a Panda update from Google yet but something definitely changed early last week.