We heard earlier this week from comScore and Hitwise, and today, still more evidence that Bing performed well in January arrived.  Nielsen has released its monthly report regarding the U.S. search market, and according to the firm, Bing managed to increase its market share by exactly 1.0 percent.

In December, Bing’s market share was a slightly embarrassing 9.9 percent.  But Nielsen indicated this afternoon that it’s cracked the 10.0 mark, landing at 10.9 percent in January.  Which isn’t a bad achievement for a single month.

What makes Bing’s accomplishment much more impressive is that Microsoft seems to have drawn searchers away from Google, too.  On a month-to-month basis, Google’s market share decreased from 67.3 percent to 66.3 percent, according to Nielsen.

Meanwhile, Yahoo gained just the tiniest bit of ground, inching up from a share of 14.4 percent to 14.5 percent.

As always, it’ll be interesting to see if these changes are the start of any sort of trend, or just one-time adjustments.  A big factor in how things play out this month will probably be how the search engines handle scores, medal counts, and athlete profiles relating to the Olympics.