The HG612 firmware upgrade doesnt 'seem' to be related to vectoring, more to do with banding changes and locking out access.
As regards to vectoring, some of the router manufacturers already seem to be ahead of the game, I know when I looked at the specs on a vdsl modem/router the other day, it was listed vectoring in its features list. One of the posters on here also informed us that ZyXEL are also supposedly to roll out a firmware update later this year for their router.