StatCounter said it took just days for Microsoft's recently revamped search to overtake it's rival and former acquisition target Yahoo, with Bing taking 16.28 per cent of the US market to Yahoo's 10.22 per cent by the end of last week. Google still holds 71.47 per cent.
As of last week, globally Bing held 5.62 per cent of the market, just pipping Yahoo at 5.13 per cent. Both are miles behind Google's 87.62 per cent, however.
Fellow web stat firm Net Applications noted last week that Bing hit six per cent market share within hours of launch, pulling it's piece of the pie away from "legacy search engines, Google, Yahoo and elsewhere," the firm said.
"It remains to be seen if Bing falls away after the initial novelty and promotion but at first sight it looks like Microsoft is on to a winner," said Aodhan Cullen, chief executive of StatCounter, in a statement on the site's blog.
Indeed, today Bing appears to have dropped back down to MSN's usual 2.5 per cent market share.
"Steve Ballmer is quoted as saying that he wanted Microsoft to become the second biggest search engine within five years," said Cullen. "Following the breakdown in talks to acquire Yahoo at a cost of $40 billion it looks as if he may have just achieved that with Bing much sooner and a lot cheaper than anticipated."
Click here to read our review of Bing and here for our history of search engines.
Get the ITPro. daily newsletter
Receive our latest news, industry updates, featured resources and more. Sign up today to receive our FREE report on AI cyber crime & security - newly updated for 2023.