What can I say, I’m a statistician so constantly reading the demographics of my surroundings! All I was suggesting is that you don’t see many teenage girls on bikes – surely somebody else has noticed?!
As far as trails go though I’m not really reading from a good sample, as most of my riding is just what’s local to Glasgow. Not quite the busy-ness of trail centres but you do often see another 10 or so bikers out on a ride.