And he also doesn't believe that any game should run bellow 60fps.Carmack said it was 'like a zero button mouse with lots of lag'. I guess we'll get the feedback from Gamescon when people actually get to use it for real.
So I think his comments should be taken in context.
Some games have more lag than others, the new XB1 controller latency is 20% better than old 360 one, does that mean the 360 was really bad and everyone noticed and complained?
The proof will be in people actually using it as you said feedback from gamescon.
But it's also worth noting that MS, view of how to use the Kinect has also changed.