The pursers on TATL and TPAC used to ask what wine I wanted from the BE (now Delta One) cabin when I was travelling in Y. It was a not a real perk, and I'm sure that that most pursers didn't do it, but it happened so often that I got used to it. Now, DMs and MMs don't even get the end of flight "Thank You" for the biz on those flights. I think the only unpublished perk is getting my luggage carried by the nearest FO (just joking).