Mine was pretty slow. On ADSL 2+ I was getting 1.30Mb/s down and 0.21Mb/s up ping 78ms
I've just converted to 100Gb Telstra Bigpond Ultimate which is a DOCSIS 3.0 based service and I'm getting around 40Mb/s down and 2.3Mb/s up ping 13ms
The only way to get it is on a bundle and you have to live in Melbourne.
http://www.telstra.com.au/bundle_save/home-bundles.html
Without the tbox it's $88/month.
So if you're on a slow connection like I was, it might be worth checking out.
http://speedtest.net/
James