I was actually referring to this theory.
First of all, if there was actually CG, after 80 pages of analysis, there would be conclusive proof by now. No CG is that good, especially not if its realtime in a game engine. And if its not, whats the point ? Even the orcs faces in the hobbit are heavily criticised for fake looking CG. If Weta cant do it on a huge budget and not real time, why would Kojima ?
Second I dont know how many watches Geofs show, but I cant imagine its that many.
Third if you want to blow peoples mind on stage at GDC, why not just demonstrate it on stage ? Why do this litle obscure interview very few in the audience are lightely to have seen in advance ?
Fourth, if they reveal at GDC it was CG all along, most people who are not us nerds on GAF will probably have forgot about the clip. There was nothing that mindblowing about it (unless its CG).