Don't kid yourself if you have these...
MaxAnisotropy=0
DetailTextures=False
Coronas=False
VolumetricLighting=False
You clearly didn't read this which explains about MaxAnisotropy=0...
I have a pretty fast video card and I have my settings to Extreme, but I force Anti-Aliasing and Anisotropy with the Nvidia Inspector tool which does it way better then any of the renderers. Also, the Nvidia Inspector tool allows the game to use 16x Anti-Aliasing while the renderers only support up to 8x Anti-Aliasing.
I get better performance and looks with the already integrated Anisotropy and Anti-Aliasing in the video card then what I would get from any of the renderers.
DetailTextures=False
They look bad in my opinion and I'm not really used to them since I always played without them for so many years in an older PC.
Coronas=False
They blind me when I play specially on CTF-Face, you can't see enemies sniping at you from the top because they stay the same size on the screen from any distance while everything else don't. Plus, they tend to give me headaches because they look too bright due to my eye problems, and I'm not going to use them just because someone says otherwise. That's a matter of personal use.
VolumetricLighting=False
I really don't like fog, specially in water lol. The blurryness at distance makes it hard to see an enemy or enjoy the graphics behind it.
Right after I posted before, I did another test because I had updated my nvidia driver which gave my card even more performance. Testing d3d9, Opengl, and d3d8 using the same exact setting in all three I got the d3d9 renderer performing the best. The difference between d3d9 and opengl was an 8.77% performance increase on the d3d9 renderer. And the difference between d3d9 and d3d8 was a 28% performance increase on the d3d9 renderer over d3d8. After doing this test, I turned all the eye candy up between d3d9 and opengl and what I got was the exact same graphical look between those two. But, the advantage on d3d9 is that there are several Injectors out there that can add custom shaders for even more eye candy like FxaaInjector, SweetFX, Nvidia Inspector (for Nvidia cards only), ENBSeries, and maybe some other ones that can give your games Bloom, Saturation, Sharpness, etc.
Also, I don't know if you guys have noticed that d3d9 also has the option to support S3TC textures as well. So, how about showing results between the two to let us see if there's an actual difference graphic-wise between them using the same exact settings? My recommendation is that you guys test the latest updated renderers and decide which one performs/look better in your end. Of me posting the conclusions from my tests was to simply share the results from my end and to give the benefit of the doubt.