Nic Cubrilovic, CEO of Omnidrive and TechCrunch contributor, had an interesting experience last night. I'll let him explain:
I have been using Mac OS X as my primary OS for almost a year now, but last night I switched back. What spurred it is that my Mac OS X partition crashed and it wouldn’t boot back into the OS - I used rescue tools and drive scanners but it appears that the partition just disappeared.
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I didn’t expect it to be like this, I didn’t want Vista to be this good - I was expecting to boot back into OS X and living happily ever after, but damn, this is one fast, slick and nice operating system. If you are a Mac user try it yourself, install boot camp and Vista and it will feel like you just added another CPU and doubled your RAM - I can’t see any evidence for any of the reports of Vista being slow or power-hungry.
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Overall, Vista is very fast and offers many new features. What used to cost $300-400 on XP in additional applications (Nero, ScreenGrabber, SpyBot etc.) I now have out of the box with a slick operating system and interface (the interface, oh the interface). In the past 15 years I have gone from DOS, Windows 3.1, Windows 95, Linux, OpenBSD, Windows 98, Windows 2000 (a nice OS for the time), XP, FreeBSD, Mac OS X and now Vista and working with Vista this weekend reminds me of the first time I ran an early preview of Mac OS X and spent an hour running my mouse across the dock (back in 2000). The job of building an operating system isn’t an easy one, and Microsoft have managed to take a good leap forward with Vista which they should get some credit for (although it probably is at least 2 years late). To all my Mac OS X and UNIX using friends, I haven’t left you - but feel free to argue in the comments, but only after you have installed bootcamp 
Apparently this offended some Mac users, at least it seems that way from Nic's comments. It's not pretty when you're excommunicated from the Church of Not Microsoft. Hey Nic, keep us posted on your experiences :).
[via jkOnTheRun]