In the article, on page two, third paragraph down, is an outright incorrect statement:
"Find a Web browser that suits your needs, it doesn't matter which browser you use, so long as it is not Internet Explorer (be careful though, some browsers, like Opera, use the Internet Explorer engine, and so should not be considered safe)."
Needless to say, I fired off an email to correct them. Haven't heard back yet though. I think the articles author, Lance Gallop, must have Opera confused with the IE shells like Avant or Maxthon. I've also "alerted" the "Opera Forums" and the "opera.general" newsgroup, so the author may soon be deluged with emails!