I would like to start with a quote from Microsoft on web standards browsers comparison:
It’s a tie. Internet Explorer 8 passes more of the World Wide Web Consortium’s CSS 2.1 test cases than any other browser
Now that’s just a start, Microsoft has put online a nice chart comparison proving that Microsoft has a better browser than anyone else. IE8 is a step up, but they are really going a very, very, very long stretch with this.
See it by yourself right there.