IIIIITHE1IIIII on 05 May 2013
No. The reason many Wii U games' release/announcement dates were pushed was because Nintendo felt they needed to be further polished.
As for the 3DS games that you mention, what is wrong with Super Mario 3D Land's graphics? Everything looks excellent in my opinion. And while it is true that Mario Kart 7 has its moments of downright awful looking visuals, the whole reason is not the game being rushed; they had to keep in mind that the game needed to be running in 60 fps with the 3D turned on even when connected with seven other players. Try out games like Sonic All Star Racing and you will see how awful it looks when the frame rate drops upon turning the 3D on.
