Yeah, I'm going to go ahead and say this is BS.
For one, no other major English gaming source is reporting it. After over a day, I figure someone else would have grabbed onto the story since it is extremely unlike Miyamoto and runs counter to his years of preaching and creating easy games for families as a whole.
Next, the main English site that is source by MyNintendoNews linked to this is Sankaku Complex which upon visiting is NSFW and its info is said to be suspect by those I have seen it mentioned.
Here is the Japanese link they claim to have gotten the info from, maybe someone has the time to translate it and confirm. Until I see some legit source claim it is true, I'll stick to it being a mistake or just false. .
http://www.4gamer.net/games/168/G016837/20130712087/







