It has slowed down for me on occasion as well. As a computer tech I can tell you how to determine if its your system or the site. Next time the site begins to load a page slowly open up a new window and load a different website at the same time. If the second window runs at full speed then it is the site, if not then you have some sort of a connection problem on your end. When it loads slow for me the other pages I have open respond just fine. So for me its a issue with the server, probably with you as well. The server is not having problems it just slows down a bit when its trying to process alot of different requests at the same time. Give it a couple seconds to catch up to itself and you'll be fine.
I guess that means that we're just getting more popular
