I had the same experience the first time I attempted to load the page. It was absolutely glacial. Then ,I tried to load the page a second time and it seemed to run just fine. I'm guessing some timing was altered when certain chunks of data got cached on the client.
Try letting the page begin rendering, then reload the page. It worked for me on FF 3.6.3 on a MacBookPro3,1 2.6GHz.
Curious if anyone else has similar results.