I hope I am wrong, but that sounds like it simply uses DX11 to simulate DX9 and 10 results, suggesting you still NEED DX11 capable hardware to actually run the benchmark (since DX9 and 10 hardware can't interface with the DX11 API at all). i.e. The point of this is, is to give a comparative score for a given DX11 card's DX9/10 performance, as opposed to being able to run the benchmark on old non-DX11 hardware..and will be using the DirectX 11 API to evaluate DirectX 9, DirectX 10 and DirectX 11 hardware in parallel.
Windows XP is still the most widely used operating system with over 44% of the market share, and leads Windows 7 which has 40.5% of the market share.people still use win xp? :O