Nothing about what he said sounds contradictory to me. In short, what I gained from reading his post is that OSX is small and it doesn't have room to grow to host a gaming population because it's expensive and the hardware doesn't lend itself to gaming. One does not simply just build a mac gaming machine for a reasonable amount of money. On the other hand, he's saying Linux does have that potential because it's cheap and pushes by certain distros have made it much easier to use.