nVidia and ATI are a lot better for gaming then Intel's graphics, but his question is simply 'what driver
version is better for gaming'.
I found that the drivers
back in RC provided better gaming ability but the newest ones from Intel do the trick, you should really just make sure the drivers are up-to-date regardless of what a game company says.
It may not be in their data-base because they are focusing on ATI/nVidia more then Intel since Intel is rather weak and pathetic in the graphics department.