In “Does your social class determine your online social network?”, author Breeanna Hare found that people in more affluent demographics are 25 percent more likely to be found friending on Facebook, while the less affluent are 37 percent more likely to connect on MySpace.

Even more affluent are users of Twitter and LinkedIn, as almost 38 percent of LinkedIn users earn more than $100,000 a year.

They also found a strong overlap between those who use Facebook and those who use LinkedIn.

But we already knew that, didn’t we?

Stats
Users with household income above $75,000
Facebook — 41.74 percent
MySpace — 32.38 percent
LinkedIn — 58.35 percent
Twitter — 43.34 percent

Users with household income under $50,000
Facebook — 28.42 percent
MySpace — 37.13 percent
LinkedIn — 17.34 percent
Twitter — 28.36 percent