I was just trying this out on some different sites. www.amazon.com got 2/5. I tried www.whitehouse.gov and it didn't work. I went to check it and it appears their certs aren't set up properly on the CDN they are using (akamai.net). Embarrassing!
Also, most of the time, sites without a perfect forward secrecy policy are sites intended to be accessed by a very wide crowd, including people still running IE6 (and bellow). Sometimes you just can't push the new technologies fast enough.
