Nielsen: Yahoo, Bing Down, Google Up in December
Nielsen has released its December 2009 search engine rankings. They reflect gains by Google and a minor gain by AOL compared with November 2009. The data show declines by Yahoo and Bing. Here is the chart:

Compare data from November:

And finally, compare comScore’s November search rankings:

I think there can be no argument now that Yahoo has lost ground over the past several months.
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