I may think they're right, but I think they're making a dumbass marketing blunder by saying it. They just look defensive and stupid. How's that for bashing?
It's a PR statement; one which makes perfect sense if you look at what market the Xbox is going after. Microsoft is trying to spin the Xbox as being "mature", and the Wii being "childish". That sort of distinction is meaningless to me, but it matters quite a bit to the masses of insecure teenagers out there.