(USA) Wii U sales vs. Previous Generation systems at launch

[HappySqurriel]

	Wii U	Wii	PS3	XBox 360
		Totals	Gap	Totals	Gap	Totals	Gap
Week 1	411,850	463,466	51,616	139,044	-272,806	305,237	-106,613
Week 2	542,583	616,847	74,264	196,672	-345,911	387,370	-155,213
Week 3	705,455	728,677	23,222	281,031	-424,424	430,386	-275,069
Week 4	849,068	864,647	15,579	378,603	-470,465	477,303	-371,765
Week 5		993,375		488,159		526,040
Week 6		1,075,329		583,058		563,282
Week 7		1,147,458		667,762		610,987
Week 8		1,231,982		724,141		674,624
Week 9		1,318,775		774,796		740,332
Week 10		1,408,031		822,690		792,043
Week 11		1,490,682		868,231		838,276
Week 12		1,572,848		911,438		878,371

Edit: December 15th