mctrivia: If loading partially finished pages is the issue, people can try to change some options in Settings that reduce the page size. Like changing the number of games that can be displayed in the main page, or changing the number of posts per page in discussion boards to five. Smiles popup also comes to mind, although I'm not sure if IE preloads this one as well or not. Adds may also have something to do with it, not sure.

I have many of those things disabled / reduced and the site works blazing fast for me on IE too, just tryed to play a few games and each page took less than a couple of seconds to load. The fact that the pages display instantly even makes the illusion that the pages load faster than in Opera (it's just an illusion, the timing is the same and I still prefer Opera, anyways, since I have much more control on how the page shows up than in IE).