Spent some time playing Sonic Racing on the GamePad today. The image quality seems a bit.. fuzzy? At times it looks particularly low res and funky, which is quite disappointing. Other than with this game, I've been satisfied with the GamePad screen quality, and that low res fuzz wasn't something I had an issue with with NSMBU.
Maybe an issue with this specific game? Not sure.
Either way, I'm persisting with it because the game is fantastic. Had such a blast with it. I wish more people were online but the single player will keep me going for a fair while. Really fun game.
Managed to squeeze about 3 hours of game time in this afternoon as well, which is time I wouldn't have otherwise had with my PS3. That's exactly why I bought the Wii U. Killer feature.