In the first week since Microsoft's went live, traffic to the site has increased into double digits for the first time in two years, but this is only the beginning and time will tell how well the search engine does in the long run. search market share to 11.1 percent between from June 2 to June 6 from 9.1 percent a week earlier, according to research group comScore Inc. However, it's still too early to tell whether Bing would manage to steal share over the long-term.

So far it appears that the lifts in searcher penetration and engagement have held relatively steady throughout the five-day period, said Mike Hurt, comScore senior vice president, on Tuesday. It appears it is off to a good start.

How, Microsoft is still a distant third behind Google Inc., which was used for more than 60 percent of searches in April, and Yahoo Inc., which topped 20 percent. ComScore has not release more recent figures for those companies.

Meanwhile, ComScore said Microsoft sites increased their average daily penetration among U.S. searchers from 13.8 percent during the period of May 26-30 to 15.5 percent during the period of June 2-6, 2009, an indication that the search engine is reaching more people than before.

Microsoft, who is spending up to $100 million on an advertising campaign for, has tried several tactics to narrow the gap with Google, including the drawn-out and unsuccessful attempt to buy Yahoo.