WinXP flickers? Please. Possibly if you were viewing it on a very slow computer with an old video card. Of course having the option to run a variety of hardware is unheard of to a Mac user so I'll let it slide.
Macs have a superior interface? What exactly are those three identical spheres in the corner of every window? Remember the hockey-puck mouse? The QuickTime 4 player? At every opportunity Apple will make something 'pretty' and overly simple at the expense of usability. Sure an on/off switch, eject button, and scroll wheel would be helpful, but doggonnit that might confuse grandma.
AppleMatters Interview: Jeffrey Zeldman Talks Apple
AppleMatters Interview: Jeffrey Zeldman Talks Apple