There exist several problems with that article. One concerns the luxury slider, since using it early for Emperor on up (and even Regent and Monarch) can work out as the best strategy if you have a settler factory. Another concerns that the article really assumes a conquest or domination victory sought and doesn't state this. For a conquest or domination victory, building many wonders early on doesn't necessarily make the most sense... really no matter what level you play at. It does make more sense for diplomatic, spaceship, or cultural victories, provided that you play on an "easy" enough level where you can build lots of them. The game automatically saves it for you, so you don't need to "save, save, save" if you want to reload... and reloading your game in general gets you into the habit of not playing carefully enough. I could probably go on a lot further and many others here could too really... but at least the article emphasizes training workers.