Nobody cares. Celcius is too much trouble when you've lived by fahrenheit all your life!

Hey! I care!

Furthermore, I maintain that it's Fahrenheit that's too much trouble when you've lived your whole life in Celsius!

FWIW, I've seen more or less the same joke but with, say, Winnipeggers and Torontonians (the latter not being known for their ability to resist inclement weater; the former being able to more or less function normally in cold most people would describe as bone-chilling). And of course, degrees Celsius.