In a nutshell, do all providers fake it? In my opinion, no. I'm sure many, but not a majority, do enjoy their work. I am fortunate to have a job that I love enough that I would do it for free, but I still make 'em pay me. Now while some of the passion may be real, some hobbiests are better off assuming it isn't. They have trouble divorcing their feelings from the commerce. (Believe me, you don't want to be that guy in the strip club asking the dancers out on a date. They laugh about that.)
I, like Reese, have also been around since the ASPD days. I don't think men are more jaded now. I think they are more confused. The newer, younger hobbyists may be warped a bit by the complexities of our social media landscape and have trouble deciphering face-to-face interactions accurately, but I admit I may be overthinking it. Overall, trying to determine a provider's true feelings doesn't really benefit you in the end. Don't get me wrong, respect her feelings, and her as a person, but know where the session ends.
My $.02, for what it's worth.