I looked it over, nice website, well done. I find all the pages load in less than 3 seconds both in firefox and in internet explorer.
You have all tables for layout. And tables inside tables so that the page doesn't show until the entire page loads.
Alternative would be to convert to a CSS based layout. See the http://webstandards.org/learn/resources/ - The Web Standards Group for more info, of which I am a member. Most of the styles I have seen for EZ are CSS based giving faster and lighter pages.
Yeah, I know it should have been done with full CSS2, but I'm just the programmer, not the designer... I do with what I'm given, and the designer is not really convinced of the usefulness of CSS :)
Anyway, even if the page may take some time to display completely, I can see in the debug output (enabled for me), that eZ Processing is always > 2 seconds, and imho this is waaaaaay too much. On other sites I have it's always < 0.5s...
That's what makes me think it may be a setup related issue rather than a design one.