I can't believe I read through this article and most all of the comments here with no mention of what the hell AMP actually is, so I did a bit of Googling so that someone somewhere won't have to.

Accelerated Mobile Pages (AMP) ( https://en.wikipedia.org/wiki/Accelerated_Mobile_Pages ): They are a competing technology with Facebook's Instant Articles that restricts the page from doing practically anything that isn't performance-minded up-front. That means very little loading, and all data calls are async. That means no document.write or other blocking calls that would prevent the page from loading. As culled from the wiki article and the amp project site, pages in AMP load in a second or less and consume very little data, making them optimal for mobile devices.