Well ok let's not get to bogged down on whether Facebook or Twitter is better or not, I think we all agree that we need new members young and older, lets face it, most young people don't have a lot of disposable income to throw at flying, it is good to target the young ones but we must not forget the older gen either. Ian tell me if I am wrong but your chat feature has not worked has it? I think because the older members couldn't be bothered with chatting and there is probably not enough younger members here to use it either, so, if what you are saying is correct the young ones want chat, what you need to do is have a very bright and exciting chat site with all the things we do as an organization running down the sides and based on flying..maybe videos, photo's, contact numbers etc.
I not expert in marketing but if we need new young members we need to go where they hang out and just remember that all the sites you put up are mainly US site with US teenagers, I think out teens and early 20's gen are a but different to their US and UK counterpart, seems like that to me anyway.
David