The topic of 'non-standard communication' was opened with examples of intra crew chat. The concept of its effect on safety has been mentioned. The discussion could be widened to pilots-ATC. I wonder if the situation at JFK has changed in the past 20 years. It was amusing to hear, on my first visit, the vaudeville performances of some.
ATC, "XYZ establish localiser 4L and call the glide." XYZ, "OK were on the glide & starting to slide."
ATC, "Commuter ABC, cleared for takeoff; immediate left turn en-route. " ABC,"OK, here we go, see ya."
What's it like these days? What was the case is the clearance ATC controllers mouths worked faster than many of the foreign crews ears.