It's not succeeding in proving the 'fold' is a myth. It's succeeding in showing that you don't need to cram all your content "above the fold" if you design the page in a way that keeps the 'fold' in mind.

The headline is misleading because the website actually consciously acknowledges the 'fold' and gives users a cue that there is more beyond it, which is almost always necessary. Imagine if the page was simply a background color. How many would scroll down the page to the rest of the content? I'd imagine very few.