I remember there were polls about it, but I cannot find them.
This one user is convinced the users here are literally below the age of highschool. I'm 25 myself and remember seeing people above the age of my parents posting, so I wonder if there's information on the ~population across ages.
They'll even outright assume you're from one of those northern countries in their world news community of all places when discussing international matters. The thought that non-NATOers can speak English and browse forums has probably never crossed their minds.