There is no real RT standardisation training for pilots. Apart from doing our own individual research, we are entirely dependant on input from training pilots. Said individuals will not always know the correct RT anyway (I have been bollocked before for using the 'wrong' RT, even when I know the other guy is using phraseology that is years (or even decades!) out of date).
Even if they do know the correct pilots RT, they are (normally self admittedly) unlikely to know the correct ATC RT. So when emergencies are being practiced, ATC is likely to be unrealistic.
Basically, IMHO, RT is not treated as a priority. There are too many other boxes that need ticking.
Hope that is not too depressing.
CPB