Fortunately, this negative "us and them" mentality is not very widespread. Most backgammon players will just pick whatever is good for them, appreciate the best of both worlds even.
As a real internet backgammon enthousiast I think one might be happy with a new, free and actively developed server that works with most existing FIBS clients. I certainly am, and I'd like to thank Andreas, creator of Tigergammon, for all his work making this possible.