https://labs.chaosgroup.com/index.php/cg-garage-podcast/cg-garage-podcast-66-blagovest-taskov-gpu/
First up, this guy has a great name. It sounds like it could be the name for an assault rifle. Fantastic.
I listen to this podcast all the time, it's a wealth of good information. Speaking of good information...
When it comes to GPU rendering, there is none.
Well I'm being facetious.
But seriously, it's hard to weed out fact from fiction and when an expert opinion would perhaps be more at home in a YouTube comment thread than on a professional blog.
Here however, is some good information on the current state of the art when it comes to GPU rendering. They get into enough technical depth without getting too esoteric. Hopefully this clears up some strong (and perhaps a little misguided!) opinions on CG threads around the Internet, but I doubt it...