Here is the direct link to the page referenced in the article.
This link spells things out better.
I'd swear Paul was reading my words because, for six years, I've been saying IE has never been a modern browser. I've also said that about IE9 but never had the time to look up all the points in the second link.
Opera is very good but Firefox is highly programmable. Webkit browsers (Chrome, Safari, Konqueror(?)) are very fast. Anything is far, far better than IE.