No, he's wrong. He claims:
and over the vast majority of Australia there is no relay of ADS-B data at all but the highest altitudes
and the maps dispute that. There is quite extensive coverage from A100 up and not unexpected useful coverage at 5000.
Coverage at 1500FT would clearly only be close to each site, same as VHF coverage.
Brad Edwards, the principal and chief pilot of Edwards Aviation which operates seven charter aircraft out of Armidale in NSW, said none of the promised operational benefits Airservices had promoted of ADS-B had eventuated, and the additional safety element was “zero”.
Those who operate in the in the W.A. goldfields and Pilbara, and the central region of S.A. would disagree.