Con-Pilot said 'We are doing more to change than anybody else is'. Errr, no you're not. Those born with their native tongue not English have to adapt far more than any English speaking American.
The machine gun delivery used by some American controllers is counterproductive when employed to direct 'foreign' aircraft. I fly for a British airline and frequently have to ask the US controllers to 'say again, slowly' thus defeating the initial objective of haste. It's a bit like listening to some of the VOLMET reports that are delivered so fast in heavily accented english that you've got to listen right through three times before you can understand it. 'More haste less speed' as my old granny used to say.