Tech is generally thought of as a male-dominated field, so it’s not surprising to see that visitors to tech blogs are predominantly male. What you might find a bit sad is just how massively the men outweigh the women.

To find out what the balance looked like, we picked out a group of popular tech blogs (and a couple of tech blog aggregators) and examined how many of their website visitors are male versus female with the help of demographics data from Google’s DoubleClick Ad Planner.

The sites included in this survey are: TechCrunch, GigaOM, Mashable, ReadWriteWeb, Techmeme, Slashdot, The Next Web, Slashgear, Hacker News, Venturebeat, TUAW, BGR, Daring Fireball, All Things D, and AppleInsider.

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How old is the average Twitter or Facebook user? What about all the other social network sites out there, like MySpace, LinkedIn, and so on? How is age distributed across the millions and millions of social network users out there?

To find out, we pulled together age statistics for 19 different social network sites, and crunched the numbers.

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Have you ever wondered how many of Twitter’s users are women? Or men? What about Facebook, MySpace, Digg, LinkedIn, and other sites in the social media sphere?

We have tracked down this information for a number of social network sites (19 of them). All the major ones have been included, like Facebook, MySpace and Twitter and also some of the most popular social news sites; Digg, Reddit and Slashdot.

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