I'm not using Https Everywhere, but just to check I tried with curl and get a 301 redirect:

  $ curl -v http://tryclojure.org/ 2>&1 | grep "HTTP\|location"
  > GET / HTTP/1.1
  < HTTP/1.1 301 Moved Permanently
  < location: https://tryclojure.org/

I doubt that anything smart on the network is redirecting:

  $ dig a tryclojure.org
  tryclojure.org.         12      IN      A       206.189.50.215
  tryclojure.org.         12      IN      A       18.192.76.182