Meta: Does anyone know more about the "read more" you get on mobile? http://imgur.com/ULhi9O2 http://imgur.com/ULhi9O2 It seems to be JavaScript only so the t

Meta: Does anyone know more about the "read more" you get on mobile? http://imgur.com/ULhi9O2 http://imgur.com/ULhi9O2 It seems to be JavaScript only so the text is all there ready and downloaded, and hidden with JavaScript. Is it a page load time thing? Has testing shown that a button like this causes people to be more likely to read the article om mobile? Or something else?