Though I have to agree with those giving the OP stick for his own lack of effort helping us here to choose good punts, I also have to agree with some of the other points made.....
1. Yes, I do believe that fbsm/fs girls will give a better level of service to punters they like, either by way of politeness, manners, cleanliness, or body wise.
2. Not all less attractive girls will give a better time, working on the tried & tested David Sullivan (Private Shops) theory, of there being plenty more fish if this current punter don't come back again.
(plenty of girls i'd guess who have no idea that feedback on aw, vivast, or places like this can affect their business & flow of eager punters)
3. Mood of the girl for any number of reasons at the time of service can also affect the job they do for a punter. Time of month, personal issues, one wrong word said in error?