From 2014 until last August, I
used to get 2.4 Meg/sec on ADSL-2, as I am less than 100 metres from the exchange. Something they did in there reduced my connection to less than 600 Kb/sec, which is the same speed as a friend achieves on the best of days because he lives over 5 Km from the exchange.
After many complaints from me, somehow they managed to double my speed to 1200 Kb/sec, which is still only half the speed compared to what I had for the previous 2 and a half years. Even now, I still have hiccups with buffering while attempting to watch the news live online. Forget about watching YouTube, as buffering occurs every 20 seconds until the link has fully downloaded. On replay, it's fine, but can't do that with live news.
During short intervals of Telstra testing in the wee early hours of the morning over the past six months, I have had speeds between 20 and 40 Mbits per second, but for less than 30 minutes duration. Screen shot below of a 2 minute burst with a 40 second surge.

Roll on April (maybe) and we will see what happens.