didn't major nelson and greenberg always tweet something like "and we got a 45% marketshare" as well? the didn't do that tihs time so maybe sony really sold like 370k
Edit:
here are greenbergs tweets of last months:
"#Xbox360 remains best selling console in the US in August with 308K units sold, 43% share- 6th straight month of 40%+ market share"
#NPD reports despite slowing of market in July, Xbox360 was top selling console with 277K sold and 45% share of current-gen system sales.
Great June #NPD results for Xbox 360, 48% share with 507K units sold, best selling console 12 of the last 13 months."
and so on...