Surprise! 1 in 5 people use Bing

Bing crossed the 20% threshold in search for the first time in March.

That's according to a new U.S. desktop search report from comScore, released this week.

But wait, it gets even more surprising. Since Microsoft (MSFT, Tech30) also serves Bing results on Yahoo (YHOO, Tech30) sites, the effective number of Americans using Bing is actually closer to 1 in 3.
Google (GOOGL, Tech30) remains the dominant search platform for desktop users, but its share slipped slightly late last year and has since leveled off at 64%.
Yahoo's share of search meanwhile has been declining since 2007, hitting a low of 10% last year. Its share saw a small spike in December, January, and February, helped in part by Firefox's decision to default its search engine to Yahoo for U.S. users.