Yeah, the site is painfully slow. A site with a multiple choice test should handle thousands of users at a time with a tiny server. How is this thing made?
From the errors returned I'm pretty sure it's a PHP backend. Considering the expertise of the average PHP developer I don't think I need to say more (this might sound mean but it's not).
And they at the bottom say 11k matches so far... too bad I like the premise!