Quote - if GC is actually improving your images that's great for you
but I have noticed a trend here where people  post Wip's etc for comments and
Immediately being interrogated about GC&VSS.
and even admonished for not having used it.
it has become almost like a new religion here.

someone recently posted  one of those
"Guess which figure" renders and instead of the usual "Alan Alda" , the first  respondent Demanded to know is VSS was used on the skin.

This is the sort of thing I noticed, which is why I wondered what it was all about. I wondered whether I was doing everything wrong and had been doing everything wrong by, first of all, using a piece of clearly inferior software that lacked the Most Important Feature Ever, and second of all by not compensating by using excessively complicated material nodes.

Quote - If, on the other hand, you're trying to get perfect photorealism, then doing the same things a photo camera does is essential. And every single digital camera on the market is converting linear luminance data to an sRGB or AdobeRGB color space in a process commonly called gamma correction.

This may be true, and it's a decent point, but if you're aiming for perfect photorealism, and you do say "perfect," I still can't help wondering why you're using Poser?