Nice post, kudos for keeping it honest and neutral while still getting the little pitch in for yourselfOk, as a photographer I'm a bit biased here, but I will explain my reasoning from the viewpoint of a client. I do agree with anon and mellors - professional photos that are not overly retouched.
Firstly, if the escort puts in the effort and expense to have photos done professionally, it shows me the professionalism of the escort in a way. There are some very reasonable offers available to escorts from photographers (I'm actually running a special offer myself right now - lol)
Secondly, I'd always be wary of homemade, or even worse cellphone images of an escort just scream sex slave to me - some pimp just took 'em and posted her profile to make maximum profits with minimum outlay.
Thirdly, if escorts get their photos taken by one of the escort photographers who advertise on this site, the photographer can vouch for the images being genuine - this might also be an idea for the staff of the site, to have a quick verification system for escort photos, if they were taken by a registered photographer here. I personally would trust this more than E-I's verification system (no offense, but for obvious reasons you can't divulge that system, but that also means that I don't know how much I can trust that system).
Fourth - especially to put Fiona at ease - there will always be black sheep (amongst photographers as well as escorts), so here's the way I personally operate. If you as an escort pay me to take your photos then you own full copyright to all the images taken. I always bring my laptop to a shoot, so if you don't want any retouching done, I can burn all images onto a dvd there and then and you can watch me delete everything afterwards. If you're not in a hurry, I can even do some basic retouching there and then and again burn a dvd for you and delete all else under your watchfull eyes.
Wow, sorry this turned into a great big letter, but I just had to give my 2 cents worth on this subject.