Best place to find answers to all your questions:

https://forums.whirlpool.net.au/forum/142

In terms of what speed you might get, you need to find the nearest one of these to you house:
https://www.google.com.au/maps/@-37....7i13312!8i6656

Basically if you're within say 3-400 meters of one of those, and assuming there is no damage to the copper line from there to your house, your speeds should be fairly good. further than that the speeds start dropping off quickly.