Today, at the SMX West 2011 conference, The Spam Police session, Google's Matt Cutts and Bing's Sasi Parthasarathy, both have admitted publicly to having "exception lists" for sites that were hit by the recent panda algorithms update, and in reality that "should not have been hit."
Matt Cutts explained that there is no global whitelist but for some algorithms that have a negative impact on a site in Google's search results, Google may make an exception for individual sites. But didn't Cutts tell us there is no whitelist for the Farmer update?
"That is true, Google currently does not have a way to whitelist a site for the Farmer/Panda update. It does not mean that Google won't add an exception/whitelist for the Panda release but currently they do not," said Barry Schwartz.
Google and Bing explained that not all algorithms are 100% perfect and thus require these exception lists.