Having said that, I have to take issue with a couple of things:

Your ease of use example used a long-time windows user. Of course a GUI modeled after windows will be easier for her to use. Then again, anything that gets wintel folks to break the habit is fine by me. Perhaps you should find someone with little or no computer experience to try this experiment on.

Staats says he uses OS X for audio editing because he hasn't had time find equivalents for PPC Linux and what it would take to recompile (a good "weekend project"). Then he goes on to say that "linux is linux is linux" on all architectures. This is misleading at best. There is far less support for linux on PPC, and many packages that are readily available for x86 haven't been ported or work only on specific and limited hardware. This is one of the primary reasons I stick with X on PPC and Linux on x86. Support for ports to OS X is far superior in my experience than support for PPC linux ports.

Lastly, Linux (even PPC linux) has far more upgrades, more rapidly, than OS X. It's one of the things I appreciate about Linux, but hardly an advantage over OS X. And before I get jumped about cost, last I checked YDL 4 was no longer free-as-in-beer. I don't begrudge them that, and I've bought previous versions.

I do applaud Yellow Dog for their work, but I just don't see the advantage. OS X is superior on Apple hardware in my experience.