We can test and feel on web site speed and fell the different where page use lot more Ajax. Here is a page to test, do it on each browser want to test.
1) Open browser want to test
2) Visit http://www.math17.com/
3) Select/Click Test
4) Type Number of Question to 50.
5) Click Print
On our test we fell Google Chrome is faster browser. We tested with IE7, IE8, Fire Fox 3.
Test yourself and put notes below. It will be helpful if you put what all browser you tested and which one is faster.