I don't care if it may not work all the time. I have to say I am simply impressed by his simple approach that appears to work. Well done obsolete. Keep them coming.
But remember, the point is that it should work for you, in your game. That's the reason for a lot of the criticism here, not that anyone wants to put down obsolete (who has gone through a lot of trouble to put up these walkthroughs).
His strategy is appealing to newer players, because wonder spamming and turtling is what newer players like to do. I did it too when I first started (in each Civ game separately, believe it or not). And if I saw this walkthrough when I first started I would also think it's great, because it would affirm my strategy to me and make me hope that I don't have to learn other aspects of the game (such as balancing teching with expansion etc.).
But it isn't an optimal strategy. And as ABigCivFan points out, one can most of the time do much better, and play a much more solid (and reliable, as in: bad luck won't immediately kill you off) game, by using better strategies.
Like pointed out in the "UNREAL" thread, there as aspects of the strategy that might be useful. But on the whole, if you don't believe the arguments here, the best argument against the strategy is: Try it (on Monarch/Emperor or above). You'll find out in due course why some people have been aggressively (but hopefully not dogmatically) defending early expansion, lightbulbs and cottages. Things tend to work out better then.
[EDIT] I'm still slightly confused about what people think is so new about building a few extra wonders if one is Ind or Philo or has stone/marble/high-capital production. This, as far as I know is nothing very new, and slightly "fortressy" cities often happen for me as the game goes along. It's just the scale things I'm opposed to. There are often more productive things than wonder spamming to be doing during large parts of the game.