But there are a couple of BIG differences between IE and the others that mean they should always looked at with more suspicion and scorn, and I'm a Windows guy. 1.-Refusing to backport IE 9 to XP means you are gonna have hundreds of millions of IE installs running on old versions, 2.- Thanks to their idiotic "Hey lets all run as admin!" design of XP when combined with IE just increases the risk of nasty, and 3.- the webkit based browsers, such as Chrome, Dragon, Safari, SWIron, etc at least attempt to sandbox the browser, whereas MSFT to kill off competition buried IE deeply into the system making IE the more dangerous choice.
Finally since you read TFA you would see that while the others kept working with the writer MSFT closed the ticket and cut off communication right up to when he said he would release even though the writer was able to replicate the bugs with the July tool and so was MSFT. Then when he was ready to release did they begin talking about "PR nightmare" instead of actually seeming concerned with the security of their browser. Lets be honest folks, IE was nothing but a tool to kill Netscape and once it had accomplished its goal it was left to rot. You had millions infected thanks to their lax treatment of security via IE 6, and they are just now trying to get to where everyone else was a year ago. Considering your browser is the closest your OS gets to being "bare metal" with the wild and woolly Internet trusting your machine to a browser that is only updated on patch Tuesday unless something completely embarrassing hits is more than a little nuts.
One of the nice things we have today is plenty of free choices is that department and thanks to the scourge of "This site requires IE" being all but a distant memory getting folks away from IE has never been easier. Just send them to Ninite and tell them which box to check. It is really just that easy. But trusting the weakest part of your security to a browser that always seems to be a day late, a dollar short, and has the biggest bullseye painted on it? There is a good reason to always assume the worst when it comes to IE, it is because that has been time and time again what you got.