I love classes where the professors use power point. Those professors almost always post the presentations online, and that completely eliminates the need to show up for class.
Personally, I have a hard time paying attention to most professors talk for an hour, and I also find it inefficient. It feels like a waste of time to listen to the professor explain something out loud when I can just read it to myself in 1/2 the time. It also seems inefficient to spend time watching the professor write things that are already written in the text book. I appreciate the guidance and motivation that professors provide, but most of my actual learning comes from my textbooks and online resources.
I understand that different people have different styles of learning, and that many (or even most) people value lectures. Using power point and posting the slides online is a way for professors to accomodate both kinds of students. Students like me can still benefit from the knowledge of the professor without having to listen to a lecture, and students who want to listen to a lecture still have that option.
One of the author's main complaints seems to be that power-point lectures move too fast, but I would complain that traditional lectures move too slow. It's just a matter of different learning styles, and not all of your professors' teaching styles will match your particular learning style. That's just part of life.
Now, professors who use power-point badly are, of course, not very helpful, but that has nothing to do with power-point. Some professors just aren't the best teachers.