People assume it is sold through. But all the translations of the press release are sales of the console. Which could just as well mean sales into the channel (which Microsoft call shipped). Which is the only thing Sony can track with any confidence. Especially as not all sales regions have somewhat robust sales estimate tracking services such as NPD or Mediacreate.
At no point have Sony or any of the news translators (Reuters is often the one quoted) claimed that the number is sold through to consumers.
Regards,
SB
GfK is very solid for Europe but they don't give public number. You can have the number but you need to pay.