Have you really seen how he is with others or is that just from things he's written? I had a therapist who writes a lot about her practice (equine therapy) and she seems really wonderful and intuitive and engaged with clients in her written version, but is not at all like that in person. She apparently had/has an idealized version of herself and her abilities as a therapist. Maybe that's the case here?

If you actually know other clients, or have seen him with them, then that would be different. I would love to see how my current (good) therapist is with other clients. Maybe. It might also be painful.