I'm guessing the way they got this statistic (if they didn't make it up completely, which they may have) is by asking the question "Would you use the expression

I'm guessing the way they got this statistic (if they didn't make it up completely, which they may have) is by asking the question "Would you use the expression 'to bing it' to mean 'to search for something'", and most people responded with "eih sure why not".