24Mbps - Unlikely unless you live inside the exchange.
Some people who even actually live next to it will get 18+
We're talking about the sync speed of your modem which will ultimately govern your link speed to the Internet.
ADSL2+ can potentially deliver up to 24Mbps/1Mbps
One of the hyped up ones going around at the moment is an AnnexM varient which can see 24Mbps/3Mbps (upstream improved).
ADSL1 is only 8Mbps/1Mbps, which is still plenty fast enough for a home DSL connection for cruising the net on.
Rough graph on speed delivery vs line distance.
One of the dudes on here who works for iiNet will probably also know about the little trial in Perth with the VDSL DSLAM delivering 50Mbps connections to a group of people in a small apartment block ..