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The first item, point 5: "font size of 80 points"

What? That's like saying your tyre pressure should be 32 psi, without considering whether it's for a Formula 1 racing car or a child's bike. It's way too big for a small meeting room with people gathered round a laptop screen, and so small as to be illegible in an arena where the main screen is 20' tall.

There's a serious point in there, but he's addressed it wrong. I'm wondering whether he's clueless regarding type sizes, and thinks "8o points" magically scales itself up and down to different sizes on different screens. Perhaps it's "80 points if Powerpoint prints it to an A4 sheet".)

The Speaker's link reminds me of a few years back when I heard the Best Man's speech from hell. He started with 'I'd prepared a few lines, but I've just done them in the toilets with Father Patrick here.' Not, I'd suggest, the best thing to say at a wedding in rural Ireland. It went downhill from there...
Point is, know your audience, ignore this at your peril.

I've got a couple of issues with some of the 10 Phrases thing. Checking that the mic is working appears to be essential at science conferences because they keep failing mid-talk. And if they all followed this "So please say, "I'll repeat that question first so everybody can hear it," and then answer it." suggestion, we'd be there all night.

I also prefer 3, where possible, it's just not always possible, because of either the show-off or because of the nature of the question. One conference I went to did something I thought was really good, they instituted a scribble board for when diagrams were required, and because it was a flip-pad they diagrams remained so the beginners could go and ask the bigwigs detailed questions in the coffee/lunch/drinks breaks.