This thread is not about C2 not supporting DX11 atm it is about DX11 in general, it functions, and future.
Dx11 offers much more then Dx9 ( tesselation, deffered lightning, displacement mapping, multi threading etc etc etc.)
Now for the people that want more info about it I recommend u guys to view the Pdf file of battlefield 3 ( http://publications.dice.se/attachments/GDC11_DX11inBF3_Public.pdf ), it says what and how it will be used but the interesting stuff is :
( page 33) Still No performant drivers avaible for their use...
I believe dx11 is great, but for it to fully be supported in every feature we will have to wait 1 year I suppose.