I think that's a really motherfucking bad piece of advice. Isn't there a version of that which is actually made by someone with some kind of ideas about readability and design?
These are all satire. The point is to KISS. I doubt doco sites need JS except for say running code snippets type stuff. But not for the UI itself. And a big long page with a default scrollbar cannot be beat for accessibility and searchability.
EDIT: http://bettermotherfuckingwebsite.com