Prediction:
When the local loop unbundling occurs for real, and other operators put their
equipment in the exchanges, they will use ADSL2+ (wouldn't you?).
To date Telecom have only been using ADSL1 with some restraint on the power settings, so that there is not too much cross-talk in the copper bundles running down the roads.
Now ADSL2+ has a very high transmission power for the dsl signal.
That will be like SHOUTING in a crowded room, so the other users of the
particular copper bundle will be drowned.
so more ADSL1 customers will see a drop off in their speeds, just as they did in the "Broadband Unleashed" fiasco.
It's what happens with DSL technologies on the shared copper bundles.
It's called crosstalk, and it's gonna bite when 2+ hits the copper.
Telecom will start offering 2+ pretty soon, and I'm picking they will sell it as the cure for any problems experienced in the unbundled free-for-all.
The wise money will switch to 2+ asap and avoid being drowned by the new
noise.
Another Opinion.