I always find it amazing to listen to the pompous arses here talk about US RT and then listen to Speedbird crossing the US and hear the same slang we are accused of. I guess the pack comes off when no other nigel can hear them.
Not wishing to get into pointless point scoring but that is utter tosh. I have been flying under a Speedbird callsign in and out of the USA for nearly twenty years and have rarely met a colleague who doesn't stick pretty rigidly to standard phraseology.