For TL I sat down w/ HR as our STL was driving to a district meeting and he called us like half an hour after getting off the phone with the HR BP since we were between DTLs at the time. For senior I sat down for ~10 minutes with the DTL during a visit, and a bit after he left my STL let me know.
I think mine was very informal compared to what some might have experienced, but he really only asked 2 questions:It looks like I'll be doing my interview during a visit. Would you mind telling me what you talked about during the interview with your DTL?