The simple reality is when a woman puts her age as over 29 on an Adultwork profile many punters won't even consider punting her! A fair few myself included intentionally set the search criteria with that as the upper age range! Problem is WG, Pimps and Madams all know this reality of the average punter when he makes bookings!
If a WG has her age set at below 25 she will get more business if they can get away with it! This leads to the inevitable attempts at massaging the truth when it comes to WG(or other actors) stating their ages in profiles. For me the issue is 'Are they taking the piss'? I know for a fact that I have punted woman who are above my preferred age range. You can as a rough rule of thumb add five years to any stated age for many WG!
The thing is judging age is a very difficult thing, I have met woman in their late thirties who could pass themselves off as mid to early twenties and woman in their twenties who look like they are pushing forty. Much of this is down to genetics and how they look after themselves. For example the Actress Natalie Portman is 37 years old and has had two children but still looks ten years younger! To be honest if a 33yo woman states she is 27 and looks it I am not too fussed. On the other hand piss taking like in the OP is not on as she is clearly not 25.
Don't get me wrong I think WG lying about their age is a sketchy practice but considering the economic drivers I hardly think it is something that is ever going to disappear soon so I personally think the most important thing to do is not to be afraid to walk when we book WG who are clearly taking the piss!