Kamiya was the creator of Devil May Cry and he didn't say that. I'm not sure, but Itsuno ( Hideaki) is the one who said that, BUT he is no creator. He was full of it when he said there is no difference between 30 and 60 fps. Both are really different. Even a dog is able to notice it.
I also liked DmC, but damn, the fps difference was quite brutal as soon as I saw the game for the first time. I'm not saying that 30 fps is a bad thing. I played a lot of games on 30 fps and I liked them, BUT any game related to Devil May Cry should run on 60 fps, no matter how bad the plot or everything else is.
Also, I didn't say anything bad about Ninja Theory, just calm down. I actually think DmC is their best game and they are still quite young, BUT they must learn how to make things running on higher fps. It's amazing seeing a fight game, action games running on a good engine and on 60 fps.
The motion capture is probably one of the most interesting things, I agree. However, think about public. Will you play a game because of its motion picture or because of its good gameplay and good engine?