For the quarter, Google gained slightly, with 79.1% of all paid search marketing spend, versus 20.9% for Bing (Note: Other search engines like Blekko and Ask also get paid, but their shars are so tiny that putting them in might actually distort the comparative results, EF says.) That was up from 78.7% and 21.3%, respectively, in the fourth quarter of 2010.

FORBES: Google Beats Bing in Q1, Game Not Over - Facebook!