As for whether he's a typical Aussie.. I have met people who talk pretty much like this. Probably none who are good cooks though.
I had a German friend here who had a very fat book of Australian colloquialisms he was learning, but I hadn't heard 95% of them. Full of stuff like "dry as a dead dingo's donger". You hear them much more in country Australia I think.
About 10 years ago our Prime Minister was widely mocked for saying "fair shake of the sauce bottle", when everyone knows it's a fair suck – a failed attempt to talk like an average Australian.