JTL Yes, quality issue exists: viewing a gradient image like Gradient Test Page, it shows few bands, but in OS X no bands at all. And Linux does poor OpenGL support, so I can't surf webs smoothly like in OS X. And touchpad completely died().
I forget to mention that in Linux, there is a way to disable dithering in Xorg configuration.
And I'm not familiar with Linux/Terminal, please kill me!! It's hard to use