Take a closer look and you will see that a lot of the tested websites are mostly used as search engines and few are Chinese. Others like mozilla.com, adobe.com, microsoft.com are not exactly sites that normal users visit very often.
For searches there is a search box in Mozilla Firefox and chrome which is a lot easier to use and change at will than IE8's.
BTW a lot of sites don't load well on IE8 no such problem with chrome or firefox.
Plus I can't install IE8, no windows.