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The other day, I had shared the Quantcast demographic data for Gauravonomics.
Today, I decided to do a small study on the demographics differences between Twitter and Facebook users using Quantcast data.
According to Quantcast data on Facebook users: 55% are likely to be female, 32% are younger than 17 and only 21% are older than 35, 61% earn more than $60,000 and 57% have a college degree.
According to Quantcast data on Twitter users: 54% are likely to be female, only 1% are younger than 17 and 52% are older than 35, 51% earn more than $60,000 and 63% have a college degree.
So, Twitter users are older and more educated but earn less than Facebook users. It may seem like a contradiction but isn’t one. Given that 32% of Facebook users are younger than 17, their higher household income is probably a reflection of their parents’ income and not theirs.
Also, the top 1% of Twitter addicts contribute to 34% of Twitter’s traffic, compared to 11% of Facebook account for 62% of Facebook’s traffic.
Finally, Facebook users are more interested in topics related to teens, bridal, fashion/ cosmetics, baby, education and parenting whereas Twitter users are more interested in topics related to politics, science, technology and news.
I’m not sure how reliable Quantcast’s data is, but it sure enables you to look at website traffic in interesting ways.

I like numbers. Let's talk about numbers. If anybody read the first link under the Related Posts, s/he will see that Hitwise quotes 63% of male Twitterers. Quantcast says 54% female Twitterers. 17% disagreement in the male/female ratio? I don't even want to ask about the standard deviations from those two sources. Clearly the statistics is flawed, unless... we have 17% androgenous people who pick their preferred genders on a day-to-day basis.
Of course, Twitter has been aggressively marketed as a business medium whereas Facebook is still a social tool. I'm not terribly surprised that Twitter users are on average older than Facebook visitors.
It actually makes sense when you think about it, because Twitter has a much bigger business demographic than Facebook does -- likely, in part, due to Facebook's reputation (among professional Gen X and older) of being an online home of drunk co-eds with camera phone fetishes and an inability to type in complete sentences. Twitter's done a good job of attracting that segment, and that group -- starting with Guy Kawasaki (who has one of the largest Twitter networks of all) and other entrepreneurs -- really fuel each other's use of the network in a way that just doesn't happen on Facebook.