Who is winning the Console Wars?

There are three sites that claim to estimate the total worldwide sales of the three next generation gaming consoles. These sites are:

- nexgenwars.com
- vgchartz.com
- consolecount.com

Their numbers are pretty close on the PS3 but vary greatly on the Xbox 360:

nexgenwars

- Xbox 360 - 11,236,789
-
PS3 - 3,514,858
- Wii - 8,298,532

vgchartz

- Xbox 360 - 10,070,000
-
PS3 - 3,570,000
- Wii - 8,610,000

consoleccount

- Xbox 360 - 11,125, 076
-
PS3 - 3,820,154
- Wii - 7,919,773

Which site do you think is the most accurate?