Yes for providers known to BS, but not one person could ever say I've made them wait ever. Communication is one of my biggest strong suits. I make gents give me eta when they head my way so I'm sure to be paying close attention to my phone. I NEVER book folks back to back, unless that's their preference and I tell them that as well. But I've had folks try to pop up 20-30 mins early with zero warning and that's on them.
Just do your research, communicate and things will go just fine.
People need to remember that not all hobbyist are as nice or courteous as others, it is a HUGE safety concern and I can bet you he has certainly learned his lesson though and will never just pop up at another ladies place.