I think it's a widely held view that many escorts "lose" 2, 3, 4 or more years from their profiles. I know one escort who does this because it's her understanding that clients believe escorts do this. Her thinking is that if she put up her true age, punters would think she was older than she actually is.
There's an escort on AW who gives her age as 28/29 but, in her FAQ, states that she's 35 (though that was on her profile over a year ago, so she must be at least 36). She does that so that if people search by age she's seen by more people.
So, if a punter saw an escort, believed she was older than advertised, and had the chutzpah to complain to Trading Standards, or the ASA, would they be obliged to investigate?
Just a thought, but unlikely to happen.