That means that the TCP limitation that applied due to the limited upload is no longer there for most plans. This has been discussed countless times on the forums.
Also with DSL2+, you've got to have a DSL2+ capable modem and be connected to an exchange or cabinet that is DSL2+ enabled. Distance is also a factor here, if you are too far away, you won't get all the benefits of DSL2+.
My torrent experience on the Business Advanced plan has been good. No improvement for me as I was already DSL2+ enabled, and on a FS-FS line... except now I can download much more for less and not be worried too much about the excess.