I'm not sure what my therapists' surreal orientations have been unless they offered up the info (my wife had asked our couples therapist and she answered). I'm an out lesbian, and have not found it an issue as of yet. When I was in the process of questioning and later coming out, it was more of a concern, but I've been out for about 15 years now and it no longer phases me (unless I'm being discriminated against or otherwise harassed about it).
I have a general discomfort talking about sexal issues with most people (because of csa and abuse) though, so I hesitate on that more than my identified orientation.