This is an excellent question!
The best situation in my opinion occurs when a prospective patient sits down with a plastic surgeon and runs through many photos (un-retouched or digitally altered!) of that surgeon's own patients. I personally spend an hour with each new patient and do not relegate this to any body else. The subtleties of each photograph can only be explained in person and are often missed on web sites.
Also, about 75% of patients don't really know what they look like and so finding comparable patients to themselves on web sites is obviously impossible!
The photos are an excellent way of examining what the skills of the surgeon are and what they think looks good. You should see in that doctor's results something that you would like for yourself if you are going to have surgery by them.

