For those who want to compare Hyrule Warriors numbers in the USA:
Hyrule Warriors - 190,000 (8 days) WiiU
Dynasty Warriors 5 - 150,000 (4 months) PS2
Dynasty Warriors 6 - 220,000 (10 months) PS3/360
Dynasty Warriors 7 - 220,000 (9 months) PS3/360
Numbers taken from NPD and Koei.