With agencies you expect to see professional sets and 90% will have been Photoshopped. Its part of the "pimps contract". These are normal procedures for EE agencies. And they tend to use the pics for a good 4-5 years later. You phone up, make a booking and say, can she wear the blue lingerie in the third pic, of course the agency say yes yes and when you turn up shes dressed in a scabby terry toweling dressing gown trying to keep warm as theres no heating and not wearing what was requested and confirmed. She explains that the requested set got worn out 4 years ago.
With AW the majority of pics are taken on a phone and uploaded. The ones that have a professional set done have something to hide in my opinion, trying to dress mutton as lamb. Always cautious of concealed stomachs, using arms or always wearing a basque ect to conceal the overflowing belly. If shes got a good enough body and provides a good enough service then she wont have to go to the expense of a professional photoshopped set.