1/4 of our 6 year old site was untouched by Panda, and that was the blog. The rest of the site kept high positions for non-competitive key words, even two word combinations. The problem is only with highly popular searches! A bunch of 20 top queries suffered. And that is around 75% of the traffic.. By the way, check out Earth Day Google logo, you will find a nice animal hiding there, guess who?