I was the one that wrote that. There are quite a lot of people that think Brain Training was created by Miyamoto. Go to any nintendo forum.
How do I know that Nintendo fans credit Miyamoto for anything? Because I USED to be a fricking Nintendo fanboy, that is why I know. In the N64 and Gamecube eras I thought Miyamoto was everything Nintendo (my ex-fellow fanboys thought the same way), until I REALLY got tired of their bullshit by 2004. Then I started investigating a bit and all was crear to me. I can´t believe I was such a tool.
For instance, do you guys REALLY think Miyamoto created Star Fox? Everyone thinks thinks this way. However, the game was directed and designed by Katsuya Eguchi and Yoichi Yamada. How do I know this? Go finish star fox1 and see the mother effing credits. I don´t even remember Miyamoto appearing on the credits, maybe he was a producer, but I am not sure, but yeah ninthings think he made the game on snes. Mario Party? I can´t count the times I have been told the bastard created this shit......when in reality the game was made by fucking HUDSON.
Anyway, I don´t even think miyamoto is involved in this game, excepting his happy go lucky PR (which I think is bullshit anyway). But of course, Nintendo has to put "Supervisor Shigeru Miyamoto" to keep the fans and press happy.