Really impressed! Took a quick look at page source, a couple of observations on why it's fast:
1. Plain, small html - page size is 6.1 kb (request took 700ms for me, I guess the server side rendering is pretty fast too), css file 11kb; note html, css and js are all properly minified
2. Font-awesome and jquery at the bottom of page to not block page rendering, both loaded throught cdn (although a fallback jQuery exists)
3. Site's own js is only 5.6k
4. No large static assets, only image on page is an svg dlogo
5. Did not check with js off, but saw hints of decent fallbacks for no-script
1. Plain, small html - page size is 6.1 kb (request took 700ms for me, I guess the server side rendering is pretty fast too), css file 11kb; note html, css and js are all properly minified
2. Font-awesome and jquery at the bottom of page to not block page rendering, both loaded throught cdn (although a fallback jQuery exists)
3. Site's own js is only 5.6k
4. No large static assets, only image on page is an svg dlogo
5. Did not check with js off, but saw hints of decent fallbacks for no-script