In the beginning they both said things along those lines. I believe I seemed a more promising and cooperative client initially. At the end, no. But I never went to session to tell them I was quitting, I did it over email. Then I just went back a couple more times here and there to talk about specific things. There was no termination process or meeting for me. I kept in loose touch with my last T via email, so there wasn't really a clear ending.

With first T, we ended in a quite nasty rupture that was never fixed and just got worse, so it would have been really weird if he had expressed anything positive. He said other nonsensical things though.

I do believe that versions of "it has been a privilege/honor to work with you" is a phrase used by many professionals who work with clients, not just Ts. I do think that sometimes it can be sincere, but both parties likely feel when it is genuine and also when it is just an empty phrase. I also think that if they want to express that they were pleased with the work/client, it's much more meaningful to make it more specific, list a few things that they enjoyed or found useful for them.