Miyamoto isn't wrong but the fact is he hasn't really made a lot of unique or great pushes directly with his own games in a while. He comes up with some great ideas, but most of his games now have something of a one trick pony feel, compared to games where he advises but someone else is clearly in charge and the main force such as the Mario 3D Galaxy/Land/World games or anything by Sakurai and his Sora group (Smash Bros games and Kid Icarus: Uprising).
While there are some Miyamoto touches here and there (maybe) those games are usually packed with content, while you see many with Miyamoto's large influence or direction , probably due to his larger role with the company beyond game design, are more barebones (the original Luigi's Mansion, the Wii series and NSMB series). One can only hope the demos that he showed off for the Wii U at E3 if they become full games don't wind up being like that as well... especially in regards to Star Fox.