Wow this is an interesting thread! Maybe I could have been more specific in my first reply. I only call my T by his title and last name "Dr xxxx", and that's ESPECIALLY when I mention him to others (my MD, my PT, my friend, family.) IMO anything less would be disrespectful.

With that said, he probably wouldn't mind if I called him by his given name (first name)...

It's up to the T what they prefer.. .and also it's up to YOU what you want the T to call you. Make this a point in session. It's been said that the sweetest word to someone is her own name! If someone called me by my former first name, I would not consider them a friend, nor knowledgeable about me