I speak from limited experience with Macs, but I'd think that a lot of it has to do with the 'out of the box' experience. I'm running Gutsty right now too and

I speak from limited experience with Macs, but I'd think that a lot of it has to do with the 'out of the box' experience. I'm running Gutsty right now too and I have it tweaked just the way I like it, but it can take some time / effort to get everything set up "your way". Of course, none of this applies if you're running the stock Gutsy config, but why would you want to do that? Essentially OSX is for people who want the benefits of *nix but don't enjoy, or can't spend the time, hacking their OS as much as hacking their code. @robmnl: Expose functionality is built into compiz-fusion, and Linux users have been enjoying virtual desktops for god knows how long.