As said before, business as usal. My personal "record" was 6 hrs APU running, pax on board. The reply on: "VKO GND, XXXYYY?" was "STOP TRANSMITTING".
Had to deice,but that really worked after that delay.
The "funny" thing was, that the broker told the pax that it was our fault. So the guy was slowly getting mad in the back, I then had the ramp agent talk to him, as he didinīt speak english. Was nice to watch the ball getting into the brokers garden. He was really chewed by the pax on the phone (and I donīt speak russian...but one could tell what wass going on)
Had a 5 hrs wait in UUDD as well, so thats Russia / Moscow. To be fair, in that case apperently the ATC Radar / Computer broke down.
I still have a very good feeling when leaving their airpace, altough a lot of russians that I met are great guys.