CPieFiller, You've obviously got some first hand experience, so you know what you're talking about. The last half of your post really hit the spot. It's interesting though, how we all seem to see this industry through our own microscope (myself included).
It appears your view comes mostly through friendships with FS ladies in NYC, the vast majority of which have spent at least some time at R&T spots. But if I read your post correctly, you're saying 99% of R&T ladies do, or have done FS work. That I disagree with.
My own microscopic view comes from friendships I've made with R&T ladies in NJ. I dont frequent FS places, so I've never made friendships there, and I am therefore ignorant of their world. From my perspective, my guess (a wild guess) would be maybe 25% R&T ladies who have also worked the FS market. I'm pretty sure my guess is off a bit, but I'm also sure that yours is off by more.
You said it only depends on the "local house rules of where they are working at the time". All the ladies I know choose the house they work in. The house rules are part of the equation when they make that choice.
This thread has some helpful insight from Nabbeun, who seems to have a wide-angle lens on his microscope.
http://www.massageplanet.com/forum/showthread.php?t=97173