Speaking as a paying passenger, I'm rather shocked to see twelve pages of rather churlish handbag-swinging on the subject of whether it's ok for US pilots & controllers to use their own 'relaxed' version of aviation english. The bottom line is you only exist to ferry me and my kin (or my latest ebay order) from a to b, and I want that done in the safest possible way. If my safety is being compromised because half of you are insisting on using non-standard terms then that's not acceptable. Standards exist everywhere and they are there for a reason - so everyone is singing from the same hymn sheet and everyone understands what's going on.
Arrogantly insisting on using local (US) slang that doesn't adhere to ICAO standards is tantamount to deliberately making an extra hole in the 'swiss cheese'. That is completely unacceptable.