Maybe, but it's also possible the subculture-focused riders are an outspoken minority. Or if not a minority, I think there are a lot riders out there who aren't married to a particular niche.

I volunteer with an advocacy group, Bike Hayward. Between the organizers and the people who come to group rides I meet a lot of people who are zealous bike advocates, but who are also casual about type of bike, and how to approach riding. I guess if I were to use subculture label I'd say "commuters". In a group that shows up to demand better bike lanes I suppose there is selection bias toward people who do a lot of riding in the city.

There's also a substantial representation from teenagers doing wheelies all through the group rides. It's good to see the next generation get excited about bikes!