Using Windows 8.1 64 bit.
Things like loading software, Firefox and Thunderbird did load quicker. IE felt better, more smooth. Photoshop as well. Even iTunes, and I never had that skinned. By quicker I mean a second or two. Not huge numbers, but still, made the system feel quick and nice. Moving windows around the screen feels better, can really feel its smoother.
Guess this is just the price you have to pay if you want things skinned. But after having uninstalled WB I think ill keep the damn Windows 8 look. The system just feels great atm.
/Henke