dazzlindonna - 3:07 am on Apr 22, 2011 (gmt 0)
as a test on a site that was hit by the second round of Panda (though not too detrimentally), I removed ALL ads. The pages consisted primarily of one large square adsense ad floated to the left at the beginning of a page's content, one adsense banner ad (468x60) near the end of the content, one small 125x125 adsense block at the top of the sidebar, and one small adsense linkunit at the bottom of the sidebar.
Remember that? I did that on the 18th. Right now, 3 days later, the main phrase that lost ranking has returned. The rest of the phrases have not, but the main one has. Will it stay? I don't know. Just thought I'd pass along the info.