On around main thing that catches around is that of competition of what is faster or better than, finally going on the competition of all those existing things on software levels folks consider.
The hype is not too useful when still the question comes on that of making mainstream working drivers to one that is to serve the main population of users.
Eventually i would say that Linux best category is that of filesystem differences one could choose for the best purpose of one, programs run on top of it and from way around of need it would come choosing one fitting that of need.
While the drivers could be optimized upon Linux side easier cause of lack of mainstream programs where one could have few around while Windows side would come across of many more, eventually being that how things work around on behind the scenes, we don't have great working open source drivers yet and seemingly it could take a while to make something noticeable on performance levels.
[From my view of indeed it has been always that openGL is better than what Microsoft offers as that of DirectX where from old time pictures it came around on that input and all things were stuck to same API and finally lead into "lag" of some of those.]
[[Yes i am currently on Linux side for some reason, i had previously purchased time for one mmorpg that i actually used a Windows OS to go around with for the reasoning of one could consider best compatibly.] And also i do not use things supplied like dual boot of OS, one that is used should be the only one needed, where actually other one has the edge upon, by the things that are offered for everyone.]
Linux gets hammered down by DirectX. Linux only beats Windows OpenGL in one test by inches... I post some more stuff when I have some more free time. I'll also do some test with anisotropic filtering enabled for ya.
AMD Phonom II 955 x4, 2gig Ram, GTX 465
Windows 7 vs Opensuse 11.3 w/ 3.6.35_rc5
Hmm, now when i see the results then moderate may be more usefull for my HD 5670 card. But you can clearly see that OpenGL speed is more or less os independant with Nvidia, ATI OpenGL 10-6 was SLOWER on Win compared to Linux. This is absolutely not logical when the opengl code is shared. DX11 was faster for ATI too but i am not 100% sure if Heaven is just more optimizied for DX11 or if the drivers already have a app specific optimization. Basically you could rename the binary to a random name that was never used for a game/benchmark and try DX11 again. When the speed is lower then it was a driver hack.