Looking at those tables, I agree with you that the 360 will outsell the PS3 in NA in December. It will be close, though.
Others and Japan will be landslides in favour of the PS3
UK will be slightly higher for PS3.
All of these are rough.
HD Combined: 6,250,000
Wii: 5,420,000
Wii > PS3 > 360
HD > Wii.
My Wii numbers may be WAY off, I basically assumed that the price cut would bring it to last year's sales.
EDIT: Lowered 360's US numbers a little.
Console | X360 | PS3 | Wii |
US | 1,450,000 |
1,200,000 |
2,700,000 |
Others (ex UK) |
950,000 |
1,500,000 |
1,800,000 |
UK | 350,000 |
400,000 |
500,000 |
Japan | 55,000 |
350,000 |
420,000 |
Total | 2,800,000 |
3,450,000 |
5,420,000 |