As a C-141 jock, we've had similar debates as the C-17 entered USAF service, here's one that still has me laughing:
The new nickname for the C-17 is
BUDDAH
because its short, fat, sits around all day doing nothing, and EVERYBODY worships it!!
A JOKE, not intended to offend Buddists
Seriously good luck with it in the RAF. It seems to be earning its keep in Afghanistan.