Deal with it. Whenever I mention learning curve to some OSS people they freak. And if you want to talk about insulting intelligence, try that fscking paperclip in Office. My god the way they always try to second guess my every move and FAIL, has annoyed me more than any platform I have ever used. However the author's major point is an almost valid one but the major sticking point I have with it is that there is not enough credit given to the core of MacOS X being open source itself.
Most config files are XML and easy to hack apart.