Possible - I don't keep that up to date with the specific capabilities of OpenGL. In any case, I'd assume it of little consequence though as many DX11 features aren't currently widely used.
Also agreed, but where it is used its very nice. WoW actualy being a good example. The game doesnt look any better but you do get decent fps boost from enabling dx11 since dx11 can pull off the same effects with less overhead. Since opengl in WoW even when enabled in windows removes options i would assume WoW is 2.x or 3.x compatible instead of 4.x which should be somewhere inbetween dx10/11 or fairly close to dx11. Actualy rather curious now to know now which version of opengl wow is using.