My sporadic and limited forays lead me to conclude that the level and quality of service nowadays is better.
I was limited mostly to crap parlours then though and I prefer indie appointments.
Then again, my all-time fave girl - jessica ex toucan, Louis as VIP was around then, and getting amazing reports, so it may just be luck of the draw as to whether the girl was good or not, like it is today.
There is of course the huge improvement in media and accessibility to comments and reviews these days - that has got to have helped the case for the modern SP generally.....
I don't think the prices today are so out of line with 20 yr ago either - in my mind this has always been an expensive past-time.