Girls often arrive in the room 3,4,5 minutes after I'm stood starkers and ready to go. They have either taken a shower or a fag. Cleaning between bookings might not always be shower. Could be wet wipes.
Read back through my reviews and you'll see that the action times can 25 minutes for a good punt and as bad as 16 minutes for a poor one. I could stomach that risk for £70 but not for £80. However most Polish and many Romanian girls on AW are charging £80 and they still expect shower time to be deducted from your 30 minutes, so this type of sharp practice is common everywhere.
If the girl doesn't happen to have a follow on booking then it could be less rushed but equally the girl on the sofa might be keen to get me out so she can use it. I liked to try out girls on the first day before they built up a following which would make them busy.
Some of the girls want that back to back because it means that they earn more. Charlotte once told me that she was relieved if a guy cancelled. Especially later in the day.