Amazingly the article refrains from providing any numbers for Australia. From the original report: - 5G: 792mbps - 4G: 950mbps https://www.opensignal.com/blog/2019/07/08/5g-boosts-the-max...
I have seen gigabit speeds on 4GX - once, when it was new and the spectrum was hardly used.
Since the reports are quoting real world maximums, I'm sure that number is true - but doesn't reflect your average experience.