Middle of the song lappers

Do you get many dancers that instead of doing the LD at the start of the next song, she starts immediately and goes until the middle of the next song? I've only had one or two dancers ever do it that way, but I can say I'm not a fan. Much rather prefer knowing when the start and end will be than the guess work of how long she actually danced. Only good thing I can think on the customer end is that you're back in the main room before the next song begins and have a chance to find someone else quicker instead of getting there at the start of the next song when all of the girls are either back on stage or in the private rooms.