I have to agree, the most painful and uninformative meetings I have been at all have one thing in common, powerpoint. Best meetings, no presentations and they get into details. His rule/method interests me.
Even acetate-based overhead projectors and premade transparencies are better than just clicking though slides. If you worry about facing the class while teaching, and OHPs the modern solution is ones that have a camera facing down and you draw on paper are quite neat and a lot less bulky.
I'm not talking about the occasional video or animation or detailed drawing, obviously there are good things you can put up on a high-res digital screen. But most slideshows are just "click, narrate, click, narrate".