I'm doing my maths now...
2010 Q1+Q2 = 5.9m shipped / 2010 Q3+Q4 = 8.4m shipped / 2010 FY = 14.3m shipped
2011 Q1+Q2 = 5.5m shipped
It need to ship more than 9.1m to match 15m predicted in Q3+Q4.
2011 Q3 ~ 6.6-6.9m
2011 Q4 ~ 2.2-2.5m
If Sony is "Slightly Ahead" their prediction then they need do ship over 7 million this quarter.
55.5 + 7.0 = 62.5m
So VGC needs to show PS3 over 61 million at 31th December.
VGC need show PS3 selling at least 2.8 million in the last three week of the year... at least 930k per week.
Or we have PS3 undertracked. Or Sony is lying and will not match the 15 million predicted.