Actually, It was pointed out a while ago that linux based systems handle gaming almost 10 times better than windows or mac (LOLOLOL MAC GAMING, HAHAHAHAHHAHAHA)
Its just developers don't like linux.
Let me tell you a story.
I purchased a computer from a friend of mine. Really good quality for gaming.
Unfortunately, it had no operating system.
So, not having much money at the time, I used Linux.
Tried playing games.
Performance was inadequate. To the point of unplayability.
I tried several games and several different versions of Linux.
It was all crap.
So I saved some money and purchased Windows Vista Ultimate.
And now I have no problems.