Here's the report where I tested your main page, you score 84 out of a possible 100:
http://www.webpagetest.org/result/111104_QS_231FX/
Here's the same exact test on your forum, 78 out of 100 grade here:
http://www.webpagetest.org/result/111104_16_231GH/
Score slightly lower but page load is faster, no idea why.
Feel free to run additional tests, with this site you can choose just about any browser and many locations to test from.
The CDN not detected, that's because you aren't using a cloud proxy like CloudFlare. Getting this installed on your site will speed you up even more, improve your grades and will protect you from a variety of bad actors including DDoS attacks, script kiddies and hackers, crackers, and the ilk.