I don’t think the study went much further than the Blue Mountains. A lot of melbournians I know say Mal Born. Launceston in Cornwall, U.K. is pronounced Lawnston and they think Australians are weird. Most people from Adelaide pronounce it ADD Laid whereas newcomers say Addle Laid or Add E Laide. Agree with ronloby, probably depends on where you went to school.
Bob.