"Bing just keeps on gaining market share, and is now growing
faster than ever before. In December, Microsoft’s search
engine gained another 0.4 percent to capture 10.7 percent of U.S.
search queries, according to the latest comScore qSearch numbers.
That makes five straight months of steady share gains for Bing
since it launched—Bing’s share is up 2.7 percent in
total since May, 2009. Google gained only 0.2 percent to end the
month with 65.7 percent market share. Meanwhile, Yahoo lost as much
as Google gained (0.2 percent) to end the year at 17.3 percent"