Speaking as someone who went to a university that could also claim this title, I think there's a tendency to overstate these things because it makes a good story (case in point with this article). The difference between top-tier and mid-level universities seems a lot bigger from the outside. The truth is, there are smart people everywhere (and, conversely, dumb people too). Someone with a game-changing idea is almost as likely to come from somewhere completely "random" as to come from MIT.
I'm not saying there isn't a difference. The difference is definitely there. MIT is great, and is a pioneer in many respects (to pick just one example, their OpenCourseWare initiative is wonderful, and MIT's entrepreneurship drive is good too). It's just that the difference isn't as great as articles like this will claim, and it does a disservice to the people doing great work at other universities to say things like this.