Also as Teletek mentioned a decent splitter, as opposed to individual dongle-type line filters, will usually improve things somewhat. You could check this to an extent by simply unplugging all other devices connected to the line other than the router and see if that makes a difference.
Once upon a time it was also possible to mess with the noise floor and other things at the Telecom end but I think with more recent equipment that may no longer be the case, perhaps someone with more inside knowledge of this could comment..
Telecom sent out a really good tech who changed the line profile and messed with the dslam settings, and got it going using a dynalink router as the telecom supplied dlink wouldnt work. Its how i learned that dynalinks are better for long distance. I have also had telecom do a distance test and I have measured it out on google earth. This particular line is as good as it will get.
I think the 10 mbit areas shown for the OP are auctually the predicted coverage areas rather than what is currently avaliable. So after the cabinet upgrade you would be within the 10mbit area. I know of others who were in the 10mbit area for months and only got 1mbit then went up to 12+ after their cabinet was installed.