Yeah, people have kind of been going off on that. The general consensus is either that it's a mistranslation or this is just another part of the humiliation they made Yokoi endure after the VB's failure. My take on the whole thing? I just knew that "Nintendo" made it, so I can't comment.
Honestly, I think people are taking this a little too far. I think what he just meant is that he wants Nintendo games to always be unique. It's not like he's saying that being like Sega is a terrible thing. I mean, nagging voice acting, ending every level with a letter rating, and occasionally embarassing music isn't typical of Nintendo, but it's certainly not an outright sin.