I'm not really sure what happened exactly but if you look at Nintendo's figures they overshipped massively for Wii / 3DS at some point to the Americas...but not to EMEAA. They only shipped 110,000 3DS systems in the three months to June 2011 (against USA sales alone of 300k, probably near 400k for the whole region) which makes no sense unless they overshipped massively for March.
I'm too tired to do it now but I have the regional splits in the article for anyone who wants to see where VGC might be off (havent read this thread to know if we are or not just yet)
Last note:
July 2010 - July 2011 Shipments:
Wii: 13.6m
X360 & PS3: 13.7m
Amazingly close.
People are difficult to govern because they have too much knowledge.
When there are more laws, there are more criminals.
- Lao Tzu