When I put on my engineer hat, I fully agree with you. But when I try to put myself in the place of a novice, I wonder.
You and I know what PWM means, but a novice?
One might expect smart folks who actually have a shot at learning to use the Arduino to begin without even a well-formed concept of the terms digital and analog. I think most folks kind of know that computers are digital and that the stuff that comes out of the wall socket and can kill you is analog.
I'm picturing a workshop where an artist asks, 'What's that PWM mean?' and the teacher says 'Pulse Width Modulation, we'll get to that after the break.' What are the chances that the artist might just not come back? And I'm not picking on artists, just trying to further dramatize a metaphor.
Smiley