I think it depends on the person, and the location. I have had the new girl rush, and the established escort repeat business. I think I am also one of the few ladies who moves around a bit more than some of the others. What I find with touring, is you are never in the same place long enough to exhaust the client base, so when I return to a place I get new and old business, which keeps the figures up at the new girl level. But there are drawbacks to this as well, I have larger costs.
Plus something else, when business starts to get a bit slow, I change my photos, my look, up date my site, and offer specials. It seems to work. I have been working for about a year now.