http://forums.anandtech.com/showpost.php?p=31520674&postcount=28 IMO this is the best and most informative post in this thread. Thanks, I understand a lot more about DX10 and 11 as a result of reading the article you linked to and why full DX11 support for the game has been so slow.
I use an ATi HD6970 card and looking at the AMD website I can't see anything on there that indicates support for multi-threading with the graphics. I can see how this would allow a fully DX11 enabled card to not only render higher quality images but also use the deferred render queue to overcome bottlenecks and speed up the processing, I hope that AMD get that added to their drivers before the patch is released.
Its driver based, so you can expect your 6970 to have it. Actually, AMD would prefer to give developers access to the metal and remove the API. Believe me the card is capable, its probably in the 11.4 beta or it will be in the final driver release (11.4). There are a lot of developers thats asking for these drivers, BF3 needs it. Multi-threaded rendering is going to be big for any dev team developing on PC.