Another interesting point on Konami's Rock Revolution, from the same source for NPD figures:
NPD figures for Rock Revolution:
360: 1,442
PS3: 816
DS: 666
Wii: 2 (yes two!)
VGC figures for Rock Revolution:
360: 10,886
PS3: 5,894
DS: 1,682
Wii: 2,115
Clearly a bit optimistic here.
(It looks like the Wii version was actually delayed until last week as well.)