The site took 4 seconds to load because of a 5.2 MB .gif used at the bottom of the page. These guys have a lot to learn.
We do have a way to go in terms of optimising the site, but we are currently only open to a small number of alpha users. I can safely say that by the time we open the floodgates to the general public, these issues will have been addressed.
Thanks for the feedback!