Someone has done a quick-and-dirty look at potential lag on the Wii U GamePad when playing VC games. As you can see in the image above, it certainly seems like there's a bit more lag than usual when playing VC titles. The image above shows Mario jumping on the GamePad 2 frames after he's seen jumping on the TV. If you've been thinking something was off with your timing, it seems that you might have a technical explanation now!