A little late to the game, there.
This post ignores two important points:
1. There are a lot of much better sites out there (linked to from W3Fools, even). Selectively highlighting a single post is misleading.
2. W3Fools is not so much for the benefit of W3Schools, but for people who link to W3Schools as reference in blog posts, SO answers, etc. There are lots of great reference sites (MDN!) that provide much better material, but circumstances have given W3Schools a lot of GoogleFu. That needs to change.