That was MBL's reaction, too, even though she is
a Kiwi (but an Aussie for years) and we only left there a year ago! When we moved to Christchurch in '03, her first reaction to hearing a couple of strong local accents was to vow to never
sound like that!
I liked the intro bloke saying "cash" to begin with (probably based on someone checking a dictionary) but changing to the Antipodean "caysh" after hearing the report.