I am now triple booting on my desktop between Ubuntu (default), Vista and Windows 7. From the onset Windows 7 seems faster than Vista and has the eye candy appeal of the new KDE or gnome desktops. So far so good, Windows 7 seems stable and quick but then I havent installed all my apps yet or played any 3d games, only time will tell.
Tip for anyone wishing to try Windows 7, install on a fresh partition and do not attempt to upgrade, or you will be b0rked when it comes to the end of the trial period.
You can lead a person to knowledge, but you can't make them think.