I completely agree with this. The one group that really worked beautifully for me was one where two therapists (working as co-leaders of my group) hand-picked members from their individual clients who they felt would jive well together. It was an amazing group and I gained some really key insights through that group experience that I don't think I could have ever quite gotten in individual therapy. It was good for me to have a second therapist experience, and the women I was in the group with were sort of kindred spirits -- it was definitely well-planned and thought out by the two therapists.

I tried a couple other groups that were just fairly random in membership and focus (before and after that really great group experience), and neither were particularly helpful - just no real affinity for the other members.