And I am sure there are clients who are into this. But, IMHO, they are the minority: most of us want a physical contact (not necessary sex - cuddling/kissing etc. as the popularity of Brass and CMJ confirms). This is why the market for independent mature SPs is relatively small, however, once such SP finds her regular clients, she will be good. Note also that such relationship really become relationships beyond sex. Note also that low volume is not a choice parameter here - it is the effect of thin demand. It is good if low volume is also what SP wants to have - it is a win-win. But the simple truth is: majority of old man prefer young SPs who do not give them headaches and will simply provide a physical comfort without any emotional attachment. A slight boost of ego is a welcomed plus. Again, everything is IMHO
Interesting take but I don't think I agree with you. I don't consider age too much when deciding to meet someone but I can say that the ages of the ladies I repeat with probably average to mid 30s. If anything, these days I am more likely to book someone if they are on the older end of the spectrum. I don't get your point that a woman who is intelligent, opinionated, interesting, witty or whatever would give me a headache. I find those qualities make for better sessions.
BTW, I have met Ruby. Her posts are one of the main reasons I became interested in meeting her. (I must admit the pics in the swimming pool were enticing as well.)
Maybe I am in the minority. I suspect less than you think, however.
To get back to the original question, I think it's much more about the individual (her personality, services, business sense, etc.) than simply an age.