As a Brit (although I live in America), I don't understand your comment at all. British society, as a whole, is absolutely infatuated with your persona (I am guessing as an extension of class). I would never, ever,
ever swear in a presentation in the UK. I might do it in the US. Remember: it's not the
word that's the problem it's that it makes it sound like you don't understand the social conventions of the position you're in.
If you're delivering a professional presentation to people you know, swear away. If you're doing it at a conference with people you don't, you appear clueless. It's the vocabulary version of turning up to a business of suits in t-shirt and shorts (or vice versa). If you're particularly powerful, you can get away with it, like Zuck does. If you're not, you can't.
Honestly, I'm surprised holman stuck strongly to this. It's childish, and, more importantly, it's fake. Swearing in the slides is fake. As the original blog post that pointed this out mentioned: "fucking" almost always has no semantic payload at all. None. It's an exclamation mark. If you want to build up some sort of chummy relationship by using swear words, put it in your spoken text. Putting it in the slides? Tacky. Clueless.