There are plenty of photoreal Poser and DAZ Studio renders around. I am talking about real photoreal, not the many Reality/LuxRender renders you see around with melted butter looking hair and skin so glossy that it looks like PVC plastic.

I wasn't talking about Poser/DAZ Studio "photoreal" (with quotes), I was talking about GCSociety (without quotes) photoreal.

If this is the best DAZ/Poser photoreal image you've seen you should browse around more. That's all I meant. Are you telling us you haven't even seen MEC4D's latest iRay renders. Her Maya iRay 2015 test render alone is a great photoreal piece, so is her Luis iRay 2015.
In the end it depends on the skill of the artist.

Maya Iray 2015

Maya Iray 2015

Maya Iray 2015

It certainly down to the skill of the artist which is why individual renders do not say a great deal about the figure other than what is possible by a skillful artist.  It also does help to have a top class rig such as MEC4D's so that you can generate such renders in a reasonable time.  I doubt I could create a render like that, no matter what figure or computer I used to create it.

On the other side of the coin, with Iray and Victoria 7, it is easier to get there. Yes, some skill is required, but, for photorealistic, less than with 3Delight or Firefly.