How has Nintendo done with their 1 year lead?

[TruckOSaurus]

Salnax said:
Almost as badly as Microsoft did back in 2006.

Wii U is actually behind the Xbox 360 in a comparable timeframe from launch:

Xbox 360: 3,617,529 units sold by June 24th 2006

Wii U: 3,191,581 units sold by June 22nd 2013