My T see his supervisor every other week. He also is required to do his own T once a week for three years to keep his accreditation up to date.
I know that I have come up in conversation a few times with my T's super, as he has told me or I have asked.

Also, I think I can tell when T has been talking to his super because he seems to change his approach from time to time...and sometimes the approach is less helpful or I do not like it. My T has told me that his super tends to prefer stricter boundaries then he does. I thought it was cool that my T admitted that he does not abide by the same strict boundaries as his super.