I personally don’t think so.
When I used to visit agency incall, the timer was usually up 10min before. Often while I’m in the shower before my way out, the girls were changing sheets getting new towels etc. They were cleaning on my time. I don’t mind, it actually reassured me the sheets were fresh. I would help her if there’s still time.
However, the garbage in the bathroom/bedroom were often full. I have seen many glasses in the sink.
I have been a client to both agencies and reputable indies, if I have to compared how well maintained the incall was, most of the time, indies incall topped the agencies one.
I can’t blame them they are on a schedule and I want to be respectful of their time. IMO, there should be at least 30min, also for the girls to have some rest and not rushing around all the time. I understand agencies want to maximise their income and it is what it is