Now, this professional colleague was parked on a neighbouring stand. Knowing Boston there must have been neighbouring a/c at the holding point. What did they see? Pushing back with accumulation on the wings is not professional, and not telling them is not friendly. Seeing the same thing at the holding point is not only not professional and not friendly is it is an accessory before the fact.
I hope we all look out for each other out there. One day it might be you!!!
An aside. Do any of the Iberia main airports become effected by snow etc often? Remember Air Florida and Potomac?!? Unfamiliar crew with unfamiliar conditions.
Better to be 20 mins late than 20 years early.