Going by the most recent research from Web analytics firm comScore, the November web search figures reveal that Yahoo continued to lose its search market share, while competitors - Google and Microsoft Bing - gained ground in the US.

The Microsoft Bing, launched in June this year, finally managed to leap the 10 percent market share barrier in November, gaining largely from Yahoo's share instead of chipping into the share of the search market leader, Google.

Speaking in terms of specific figures, the statistics from Internet use tracker, comScore, revealed that while Yahoo lost 0.5 percent of its market share and slid to 17.5 percent; Microsoft Bing gained 0.4 percent market share during the month, thereby ascending to a 10.3 percent share. Meanwhile, Google's share increased one percentage point to 65.6 percent.

The latest comScore figures come within two weeks of Microsoft and Yahoo signing their search deal, whereby Microsoft would supply the Bing search engine to Yahoo's sites, in return for a small portion of the advertising revenues.

Despite the fact that Bing steady rise, the caution of the Microsoft executives about the search engine's progress was evident from an earlier statement made, at the Credit Suisse 2009 Annual Technology Conference, by Microsoft's Senior VP for online audience business, Yusuf Mehdi, who said: "We have a very long way to go in search, where we're outgunned by Google's scale advantage."