Always cool to get comparative numbers like this, from NeoGaf, this is the N64 vs. GCN vs. Wii vs. Wii U first year sales in the US market.
http://www.neogaf.com/forum/showpost.php?p=81552721&postcount=105
Aug LTDs (most recent NPD month for Wii U):
WiiU 1.25m
Wii 4.0m
GC 2.1m
N64 3.6m