I'd have a couple comments -
1. We intersect a little in terms of zones (westchester and Manhattan) , but in my more local area (CT, Mass, RI) there are many girls who are still young and pretty enough to still demand premium prices (even in Manhattan) for FS, but choose not to (unless they want to). They're burned out, flying way below the immigration radar, whatever. Mostly working in very low profile spas, with no reviews preferred. But they like being out in the country, and they like choosing who they give FS to, not being forced to deliver the goods to every guy that walks in the door. Not every girl is solely motivated by maximizing their money making. There's other girls, still real hot, that are out here, because they want to own a spa, and its cheaper/easier to do here (or so they think).
2. Right or wrong, i rarely tip based on looks. i tip more based on services rendered and enthusiasm. I do consider looks when i decide where to go, or when i negotiate a rate at an indie or agency. but once i'm in the door at a spa, the tip is based on services rendered for me. It's much the same with me as tipping a waitress. i dont tip her on how she looks, i tip her on how efficiently smoothly and effectively she delivered the meal. There are limits of course. if she's so large I'm getting crushed when she rides me, or i have to roll her in flour and go for the wet spot, I'm going to deduct that 10 bucks that started this thread.
3. I think as a group- we're better tippers than the average. I hear plenty of stories which I believe from girls I see about guys that give 10 or 20 dollar tips for an hour massage with a HJ. Or guys that get upset because they cant get erect or come and tip 0. I've had nights where i come in and basically doubled or tripled the tips my girl got for the day even though she already worked 5-6 guys, because she was unlucky and there's a lot of cheap guys out there. Tipping is a lot less standard than you guys seem to talk about, at least where i monger.