loads for me in a few seconds

Loaded very quickly for me (under a second for the home page and most interior pages, maybe 2-3 seconds for a couple of interior pages). Might be your internet connection, or perhaps it's only being slow when you're logged in to the site (I've noticed that some sites I've done are *much* slower when logged in -- but I am not sure why because this doesn't happen on all sites).

If you're looking for general performance tips, I've found these threads to be useful:
http://www.concrete5.org/community/forums/chat/website-loads-very-s...
http://www.concrete5.org/documentation/developers/system/performanc...
http://www.concrete5.org/community/forums/customizing_c5/change-you...

You've got a 404 error on the swfobject.js javascript

Unless it is in your root, the above won't be found.