I've Chrome 12, Firefox 5 and IE 9 installed. Here are my results:
http://www.webkit.org/perf/sunspider/sunspider.html
Ch 354.8ms
FF 294.5ms
IE 296.8ms
(lower is better)

http://v8.googlecode.com/svn/data/benchmarks/v6/run.html
Ch 6645
FF 3145
IE 1934
(higher is better)

http://krakenbenchmark.mozilla.org/
Ch 5927.7ms
FF 6838.6ms
IE 17990.3ms
(lower is better)

All on my four years old notebook. How do you perform? And I can confirm that Chrome simply feels and is the fastest browser. Look into your task manager while playing a flash video on youtube: Chrome consumes half as much CPU power as FF does, although both supposedly use hardware acceleration.

Joey