Thank you all for your experiences. It's great to know that others are seeking, and having positive results with professional, "real-world" therapy. Involvement with any cult, particularly via indoctrination since childhood, cannot be discounted in the evolution of one's mental health throughout the course of a lifetime.
Because I thought I had extracted myself from the organisation very much in tact, I presumed that the religious stuff really wasn't an issue in my life anymore. It wasn't until my current psychologist that I saw how my thought processes really had been muddled by things I was taught as a child, and the bizarre, and hypocritical behavior I saw my parents exhibiting.
I guess one's own childhood experience seems normal, even if - in retrospect - you determine it was profoundly abnormal. Dr Marlene Winell seems to have an incredible grasp of this concept, and of the "normalization" of religion as a whole. Thank you for the resource, gone for good. It's great to see that there are some experts in this field.
I also agree with paranoia agent that there's an art to the profession, and some are inevitably better at their craft than others. No doubt it's also a personality thing, and, as with any interaction, some therapist/patient combinations are more effective than others.
Even when seeking therapy for reasons that seem entirely unrelated to indoctrination, it's worth having the conversation, and a good psychologist will draw that out. It seems that post-cult after-effects can present themselves in ways that may not be obvious, especially if you believe you've already closed the book on that chapter of your life. As my psychologist told me: "we can treat behavior, but behavior is nearly always symbolic."
