It's really a skill issue IMO. I've yet to see bad golf played fast. It's more than the just the distance between shots. The person that plays that way is always inconsistent. Being ready and considerate isn't the problem. Move the unskilled up and it leaves less room for problems. Put a shorter club in their hands and the mishits don't travel as far. Ask yourself am I faster kicking through the weeds or walking to a ball you can see. Ignorance is a factor as well. The people I see struggle from the tips aren't just one tee wrong. I see just as many on the whites that would benefit from being up at least another set. Problem is the more tees courses offer the further it seems people play from where they should be. Especially young men, lot's of misspent testosterone on the course.
My thoughts exactly. I often see the kids with borrowed clubs hitting from the tips and swinging out of their shoes trying to reach in one,usually with an iron in their hands and hitting it so fat the grounds crew's ears are burning.