Bing better deliver a bang for Microsoft.

Microsoft's search engine suffered a steep usage drop in May, right before the company launched Bing, a new version of its search engine, according to the latest market share figures from Nielsen Online.

U.S. residents ran almost 15 percent fewer queries on Microsoft's search engine in May year-on-year, although search queries grew 20.3 percent in the market overall, Nielsen Online said Tuesday.

Microsoft's Live/MSN search engine was the only one among the top five that saw its search usage shrink last month compared with May 2008.

More: http://pcworld.com/article/166773