TechCruch reports that recent data indicates that there is a socio-economic divide between the frequent users of Google and Yahoo. They even have a graph!

The differences between the groups aren’t great, but the results do go some way in explaining the Yahoo conundrum. Although a distance second in search, Yahoo has remained the number one traffic destination online ahead of Google, so you’d think with more traffic Yahoo would convert that traffic into similar returns to Google. But alas we know that not to be the case, and that would appear in part to be related to people using Yahoo not spending as much online and being in poorer demographic categories than Google users, providing a lower return per user.

via Smart Mobs