They make a fair point I think. Although I bet plenty of L4D players would actually like that mini-game!
But they're right. So far only Nintendo has really used controls well. Everything shown so far for Natal looks like a weak copy and gives me little confidence that MS and their partners understand how to develop something really cool using the tech, and to be fair what's been shown for the Arc falls into the same camp for the most part, although a couple of elements looked not bad.
This isn't to say MS or Sony won't deliver, just that the evidence isn't great so far. Certainly looking at Jonathan Ross leaping around doesn't instill me with confidence.
Try to be reasonable... its easier than you think...