Early stats from Statcounter show Bing taking off in a big way in the United States. As of yesterday, Bing was at 16.28% marketshare while Yahoo! hung out at 10.22% marketshare.
Meanwhile, Google's market share has dropped about 6 points from 78.07% to 71.99%.
Of course, Bing has only been live since Monday. It could just be curiosity. But if people are truly liking Bing, these numbers will be corroborated by comScore and Nielsen data. If that's the case, Bing may be a decision Microsoft got really, really right.