Dude, why so hyperactive suddenly?
AFAIK, the man knows what he's talking about.
I was educated in both GCE O' Level syllabus and Aussie Secondary Education syllabus and personally speaking, Aussies and Kiwis' are in no position to make a fuss about other people's English.
ICAO Level 4 is all you need to be a pilot man. Only Aussies are so anal about Level 6.