Note: I'm a switcher but a tech head.
I believe that the OS X Beta did have the transparent window borders and windows just like Vista does now. The only problem is that with the transparencies you lost depth for your on screen applications. Try stacking or picking Windows when you can't even tell which one is on top of the other.
I've found that most OS X applications do a decent job of following Apple's Human Interface Guidelines and you get some nice carry overs from Linux/UNIX as well.
Good CLI-based application + OS X GUI goodness = WIN
What's your point Eidorian? Sorry but I don't quite follow, are you arguing with me or agreeing with me?