That's an awful website too. White text on dark background is a complete readability failure, no matter how much contrast it provides.
If I have the time to dig up the article I am thinking about, I will add it to this post.
(Here is the HN thread on the contrastrebellion site: http://news.ycombinator.com/item?id=2807047)
Anyway - each to their own. It looked okay to me, apart from some tiny script in places. (Safari, OSX 10.4, 1280x854)
I prefer white-on-black. To me, reading black-on-white feels somewhat akin to staring into a projector.