I saw the preview too. Seems like a bit of a beat up. CASA's introduced the English standard test this year, and while it isn't watertight, at least they're doing something. Has anyone heard of any students failing the test? Will they bring up last years mid-air at YMMB?
I played ATC recording/streaming to my father a few weeks ago (liveatc.net) and he had difficulty understanding what was being said, and it was in plain english without any accents.
There are some woeful radio calls out there however!