Re: Perhaps the tide is changing.
I have a good kids class. I only have two parents who train in the adult class as well. In the US, it seems that children's traditional martial arts classes still do very well. When I tell someone that I am a professional martial arts teacher they often assume that I teach children, and that this is what martial arts teachers do. There is sometimes a bit of a shock when I tell them that my main emphasis is adult learning.
However that might not have so much to do with martial arts specifically, and more to do with the idea that in general physical education is for children. A friend of mine (32) went to a large gymnastics school to enquire about their schedule and rates. They asked him "what age", when he told them that it was for him, apparently they were quite surprised and told him that they didn't have classes for anyone his age.