Gunger - the atc recording i heard (the link to live ATC) had several transmissions "stuck" together (so there is some obvious repetition where they overlap). Also some transmissions clearly havent been recorded.
Sounded very calm/professional to me from the bits I heard.
As for this bit
You might want to look into the FAA procedure in regards to PAN/EMERGENCY!
...is largely irrelevant - as Australian registered aircraft are approved to use their Flight Admin manual and procedures. The Jepp WWT (world wide text) outlines a summary of the main changes which are relevant (in addition to company Route Manual).
From what we have seen over the years the USA /FAA /ATC dont have a particularly good track record with Radio Voice Procedure. Its all a bit care free really.