I wanted to stop reading right there, because the reviewer is ill informed by what it means to be "free," however I stuck it out and he gives a favorable review.
It's a decent Mac-user-tries-Ubuntu anecdote, not so much a review. But he does bring up one good point: Apple spends hojillions on advertising, and Microsoft at least matches that. Word of mouth is great for converting power-users, but there's a reason the advertising industry churns through so much money -- it works.
Sure, the more users you get, the more potential developers there are, and the better the system will end up being. And of course there are commercial Linux distributions. But in general, Linux doesn't need advertising, because it doesn't need to "win." It just needs to stay alive for those of us who want to use it!