Yet to see a PC run pro tools 8+ stabely. (yet to see a godamn mac do it come to think of that

)
All the Avids I've seen are PC. Not making a call, just saying.
Our machine room assistant said to me the other day that Final Cut Pro stores ALL its metadata in .FCP files, as opposed to the bin/project structure of Avid. No problemo, but then he told me that once a .FCP file exceeds 20Mb it falls over and sometime corrupts. I chuckled, but then he made a good point I think.
He said that its aimed at a different end of the market. if you're making a reality show every single day and there are days and days of footage, Final Cut would be suicicde. But if you're making a film clip or a short film it rules, plus its nice and cheap.
One of these days Final Cut might come out with a comprehensive hardware media storage solution +support and development. I could totally see Avid picking up their game then. I kind of hope it happens really, competition is good. I'd like to see Final Cut weighing into the heavyweight end of town. Its got some agonising flaws, but overall its a really good program and I'd like to see more of it.