In a way though, this could serve as a kind of test for the student beforehand to see which parts they're comfortable with. I recently gave a presentation like this as part of my course and tried to follow the style described in the article. I started out with quite a nice visually appealing set of minimalistic slides, but ended up with a hybrid of that and what you usually see in lectures that also need to serve as handouts for later. So yes, I agree that people giving presentations as part of school projects should be cautious about trying to do more than they are ready for, but I also think it's somewhat a shame that we aren't given enough opportunities to practice that other side of presenting as well.
I have been trying to increase the amount of practice students get. Irritatingly, many students get very annoyed when asked to give talks for which they will not be graded, which makes it hard to give students the chance to practice in a risk-free (by which I mean mark-free) environment.
