Shipment numbers does not paint an accurate picture of the current situation between the Xbox 360 sales and the PS3 sales.
From the figures posted on page 2 of the thread:
PS3 numbers sold
USA Total: 802,000
Japan Total: 203,059
Jpn + USA: 1,005,059
Xbox 360 numbers sold
USA Total: 594,400
Japan Total: 24,180
Jpn + USA: 618,580
As you can see, the PS3 outsold the Xbox 360 by a total of 386,479 units in just Japan and the US. If you were to add Europe where it tends to be a stronger market for Sony than in the US, those numbers could very well be higher.