I use Firefox. I don't like Internet Explorer very much. Just thought I'd mention that up front.
At the risk of labouring points already made, this is a pretty weak apology. You were caught out. It wasn't just you: if the BBC and these various other wire-reliant news parrots can fall for it, there's no reason you shouldn't. But you, like they, should have the balls to front up and admit it when you're wrong. And I mean admit it properly: don't just make some breezy self-deprecating joke and say that you were actually right all along anyway. You call their retractions 'flagellation': I call them a sign of honesty - even if it's honesty for the sake of profits rather than morality.
You took a story you liked presumably because you thought it plugged into a common prejudice and would make your readers feel good about themselves - which as we saw, it did. So they had a nice day chanting "I told you so". But then, as I understand it, it was the bloody *BBC* - not you or any of these shiningly intelligent commenters - who became suspicious and uncovered the facts. Must smart.
The simple truth is that, as with all prejudices, there may be individual occasions where the prejudice is accurate. There are people who use IE who are less intelligent than the average. There are also people who use IE who are more intelligent than the average. Selection bias will see to it that those seeking to confirm a prejudice will jump on what they see as evidence for and avoid or play down what might be evidence against. Such bias is what would lead someone to a "we're still right" non-apology like this article.
(And besides, this particular prejudice confuses - as people so often do - intelligence and knowledge. You can be as *intelligent* as you like, but unless you *know* about a particular browser's flaws, you might still see no reason to avoid using it.)