Well there of course are some areas which got some nice improvements or make a more efficient coding possible. When we're talking about an actual use in a game under "normal" conditions the DX11 performance advantages should shrink down as usually the scene management is what becomes decisive for the performance. So when speaking of a general performance boost through DX11 I wouldn't bet on huge improvements. I mean you can try playing AAA games in DX9 and DX11 mode as that's possible in some titles. Changes in shader code and additional DX11 features (e.g. better shadows) aside you won't be able to skyrocket your fps. Improvements are definitely there but not in a magnitude that I'd say that this is what 3DGS needs to become a beast...