MissC, I'm really interested in your experience with group T as I've been thinking of looking for a support group too. I hope it goes well for you next week and the experience is positive enough for you to continue. Although I haven't been in group therapy with my T, I have seen him outside of his office in groups of people, interacting with them. It is really interesting to see how he is with other people, what he says and how he says it, etc. This experience helped me to know him better and give me more confidence that how he presents to me in session is how he really is. It could be you would get some of the same from being in group with your T.
Good luck.