Some of the most difficult ATC direction I've had in the past year was at EWR/TEB. For example, I was giving a heading to intercept at EWR and the turn to final was 110 degrees,,,, (a little more than the customary 30 degrees eh?). I heard from an FAA inspector that over 50% had been there less than a year. Whatever the accurate number is, it shows a great deal of transition. I didn't care to ask if the controller was Chinese or French or US or both or all three.
In my book, HK is far better than similar places like JED or DXB, I'd give them a mark of "upper half" in my world wide rankings.
FR