I found it to be a stupid sketch, I’ve lived in the general area for 22 years (not a native) and NO ONE talks even close to that sketch.
However it did pique my interest in watching the actual show, which I’ve enjoyed immensely. The only actor who’s accent feels a bit “off” is Winslet’s. She does this exaggerated, Australian-like “O” sound, that nobody does around here either.