Usually,when I note a new member I'll check their profile and age if provided.I always see new members between 20 and 30 almost daily.Then it seems they rather lurk in the background not making or commenting on any post or don't hang around long.Its good that you're talking about it and I hope it encourages others to speak and start threads of their own choosing.
As far as the age is concerned,I don't see where it should be a dividing line among people with the same interest,after all isn't it that which makes a forum,it's diversity.I personally would like to hear more about all styles from all age groups,so get posting.