I know who Carmack is and I respect what he's done, but he's not gonna come out and praise the thing. It's like Shu walking into a bone conference and singing its praises.
I don't think Oculus and Sony are on the same level of PR restraint, frankly.
Carmack has always been more than honest with his opinions and while i can see him making a "no comment", him slandering the competition with something he doesn't think is true? That's a whole other thing.
That's why i think your comment is not appropriate in this case.