Actually, on the point raised previously: does UA have some kind of permanent staff here, at least in the winter, given the frequency of this occurring? Are there ever instances where the plane has had to stop for much longer than normal and pax get deboarded overnight -- necessitating a UA CSR crew?
IIRC there have been a few instances of passengers having to wait it out at Gander/Goose Bay and I guess they just keep them on the plane or in the secure area outside customs. There is no permanent or temporary UA staff at those airports as far as I know and probably no plans to add them in the current cost cutting mode of the airline.\
also, UA65 LIS-EWR is headed to BGR today (1/5/15) and it left LIS 3 hours late so it will probably be ~4.5-5 hours late into EWR.