The issue appears to be a SunSpider bug, not an IE9 bug or "cheat". See http://news.ycombinator.com/item?id=1913368 for more information.
lordgilman, I hope you now realize it would've been wise to wait before passing judgment (especially in a public forum).
Edit: I don't know what's with the downvotes. I'm just going by the HN Guidelines, posted at http://ycombinator.com/newsguidelines.html? If you have a problem, don't downvote me, take it up with pg.
They now state that IE9 is certainly cheating on the sunspider.
I hope you now realize it would've been wise to wait before passing judgment on lordgilman ( especially in a public forum )
He wanted a direct answer while at the same time giving them the benefit of the doubt.
But whatever, your mind is made up.
Note, I'm not saying they're NOT cheating. I'm just saying that no one has yet provided strong evidence that they are.