It says right in the linked PR that Sony is estimating how many consumers actually bought the device.
So this isn't shipped... it's sold through to consumers.. which is always an estimate.
Amazing sales either way. Will be really interesting to see long-term sales though. I could see the trend not really continuing for either company.. 8 years was a long time for so many 10's of millions to wait.. we could be seeing 2+ years of console sales shoved into the first half a year and then drop back down to more normal rates.
Number of retail sales to consumers is estimated by SCEI.
So this isn't shipped... it's sold through to consumers.. which is always an estimate.
Amazing sales either way. Will be really interesting to see long-term sales though. I could see the trend not really continuing for either company.. 8 years was a long time for so many 10's of millions to wait.. we could be seeing 2+ years of console sales shoved into the first half a year and then drop back down to more normal rates.