Seriously the only smoking gun I am seeing is the claim that the TGS version was running on a PS3... which might have just been a PC build running a specific instance in Demo form to show off the game
All subsequent PS3 previews including the beta test are easily accessible on Youtube and look very damn close to retail
That is really the only thing that can explain the TGS demos running on PS3s. They were just PCs with PS3 units on the table showing DS3 button prompts, common industry practice.
The TGS trailer was for running on a PC (source:1080p/60FS) at the same graphical quality as that demo units. Then the console version releases a couple months later with neutered graphical effects and performance problems?
Well, that's very often what a demo is - a build separate from what you'll get at retail, or a game section tailored to be played a specific way. And in this case, it's my understanding that what was played on the PS3 wasn't advertised as a demo, but rather a quick beta session. Am I wrong there?
The TGS demo had the exact same textures and geometry as the retail console version. The only differences were the graphical effects, darkness mechanic, and minimal texture swaps.