I would say either you are on to something or you are on something as the common man once said...  At any rate, there could be something to what you are saying but I do know from experience that the ad can say 18 or 19 and when you get there they will admit they are more like 22 or 23 or whatever.  Bottom line is they know what sells and attracts attention.  You typically won't leave once you are there as you don't have other options lined up...  Lies really are a pet peeve of mine but they are a reality of the business...

I tend to stray away due to the lack of ref / reviews.... but each to his own, aghast I am not the brave one.

Probably like the ones that say "Athletic Body"...

Many of them are probably NOT 18 or 19, just like many of the ones that claim to have an "athletic body" have huge beer guts and are heaps of jiggling blubber.

I suspect a lot of them are, if not outright fakes, highly misleading even if there is really a teen-aged girl at the other end of the phone, she's almost certainly not GFE.

I wouldn't be surprised to find a lot of new girls trying escorting out given the economy.  These days someone coming out of high school without much in the way of marketable skills is competing with lots of older, more skilled, and more experienced people for even entry level jobs.