As a one-time AT driver I can attest to the often poor attitude of the Movers. I too have heard them 'make up' stories to account for a delay or whatever and it is bloody poor behaviour.
I once insisted on going into the terminal PA to the pax in person to explain a short tech delay and the Movers nearly had a fit! I insisted, carried out the PA and had an Army capatin approach me and say thank you. My PA had just contradicted some bull**** that the movers had PA'd moments earlier!