If the main benefit noted so far has been an arrest in shedding, I'm not sure what the pictures are going to prove.
Even if patients continued to shed for the 8 or so months after the treatment, would we see a great deal of difference in the photos? I guess it would differ on a case by case basis, however, it would be very difficult to judge on photos alone unless there was large loss. The fact that patients are booking back up (which I have no doubt is true) shows that they believe the treatment is working. While we all want and hope for photos and evidence showing impressive results, I believe patient feedback is the best we can expect in this short time.