IE9 and Chrome are neck-and-neck!
But today I installed IE9 RC and it is fast!
Chrome 9 and IE9 are actually virtually neck-and-neck in terms of speed on all projects I tried with IE9 just a tiny bit faster.
The Brute force solution for the Eight Queens problem runs in 6 seconds in both bowsers.
The Bifurcations Math project runs in 6 seconds on IE9 and 7 seconds on Chrome.
And the picture below shows how far the Mandelbrot program got in one minute -- slightly longer (that means faster) on IE9.
In the picture it is also easy to appreciate the compact chrome of IE9. It takes much less screen real-estate than Chrome.