Big 3 Shipments VS Sales every quarter/year since launch

[Fumanchu]

Jay520 said:

If that was the case, there would still be something wrong because that would mean that their quarter started 4 weeks after April. 

But would be circumvented by the fact that they'd be perpetually reporting on future shipments...making it always seem like they 'overshipped'.  I'm not sure anyone in the public is treated to Sony's book-keeping methodology.