All right, if you want unbiased, then how about you test for yourself. Download the latest stable version of IE, Firefox, Chrome, Safari and Opera, visit this site and test heavy sites like NG, YouTube and Kongregate.
I know this because I've done it for a school assignment. Opera and IE ended up last, and Firefox and Chrome tied for first. Of course, my test conditions weren't perfect, but they do follow the general trend of browser tests.
(Opinion begins here)
RIght now, IE is utter shit, it's just a few more lines of code on top of IE6. Hopefully Microsoft is actually trying to make a good, competent browser, but right now, IE usage goes down, Firefox goes nowhere, and Chrome shoots up.
Plus, there's no requirement to install every Firefox or Chrome addon there is. I only use a few and a bunch of Greasemonkey scripts, which don't even slow the page down a bit for Chrome.
As mwmike says, the only reason you need to switch browsers to do some things is because IE has horrible standards compliance. Opera, Safari and Chrome et 100/100, Firefox is close to getting perfect, and IE has 20/100.
Maybe one day, Microsoft will get off their asses and make Internet Explorer 9 a more competitive browser. They've been making progress lately, if you read any tech news, but the only reason IE is regarded as a crap browser is because Microsoft assumed that since they had the vast majority(at the time) of market share, they could just sit on their success and do nothing. Meanwhile, Safari and Firefox are launched, and they both innovated features to make their browser better. Chrome is later launched, gets attention, and like Safari and Firefox, innovate, causing a mini-revolution with putting the tab bar at the top of the window.
But the thing these three did, was release frequently. This meant that the developpers could show that they care about the project, and improvements to the browser came constantly. Not to mention, Chrome just adopted a six-week release policy, so new versions come every month and a half. There was a huge time gap between IE6 and IE7. When IE8 was released, Microsoft got the feeling that some guys were contesting their market dominance.
And guess what happened?
deep breaths, deep breaths