No, I believe that there are qualitative differences. But, as we all know, in an industry with so much hucksterism, it's hard to separate the wheat from the chaff. Which is why everyone's on boards like these, no? To try and limit our risk and figure out who's for real and who's not.
But, to answer your question more specifically, I think there's a difference between a Gia and a Ferrari. Or an Armani tailored suit and a Sears house brand special. These are qualitative differences that go beyond mere perception. In my example above, she was a Sears house brand type of hooker and knew it. She tried selling herself as an Armani and fooled some people with her ad. But she knew, and was comfortable with, who she was and didn't pursue it any further. I suppose she could have. And, depending on what her client's expectations may have been, she might have gotten away with it. But, at that point, you have to ask yourself whether there's a qualitative difference in services between a high-end session and a mid-level session. I think there can be, but you have to be careful to choose a genuine high end provider, and to know the difference from the get go.