Digital Foundry complains about Mario Kart 8 dropping to 59 FPS.

[Zekkyou]

kirby007 said:
if i read this correctly : every 63rd frame gets doubled?

Pretty much. It's most likely an internal timing bug within the WiiU, so i wouldn't be particularly surprised if they patch it (or just leave it since, as DF said, most aren't likely to notice it).