The argument that "eyecandy is a waste" is so mute, when you are touting 'aero' like it's the end all for everyone... If eyecandy is waste then there is always plain jane dos for you to go back to, but I don't see people running back to that. LOL.
Also graphical intensive ability demonstrates the speed of an operating system better than most other things, and I think Linux has definitely mastered it.

If you really think "eyecandy is a waste" then strip your windows down to nothing but a shell, or in the very least remove the themes and set everything back to flat land, and while your at it, why not primer your car. LOL.
bad eyecandy, bad! sit. good candy.