I've never understood the better at video and audio editing thing. Does it have some great programs for both? Sure. But at least for audio I can do the same damn stuff with Sonar on my PC and you know what's really cool? Sonar's work flow actually makes logical sense to me in that it works in the way I would expect a DAW to work. Not to mention having far more freely available and really good audio plug ins available on PC.
I can't speak too much about the video editing side since I don't really do any. I do remember being with a friend when he was trying to do something in Final Cut Pro I believe for school (though it could have been another Mac only video editing program if there are any). I can't even remember what it was we were trying to get to work anymore, I just remember it should have been the easiest thing in the world, but after half an hour of smurfing around with every damn feature we could find we got nowhere and he had to ask his teacher the next day. This has pretty much been my experience with every Mac only program by the way since my sister has a Macbook. I'm sure they're plenty user friendly and easy to use once you get past the obnoxious learning curve when almost no program does what someone who's used a PC for 20 years would expect.