Odd sort of thread for this site, given you have data at a mouse click suggesting this very result:
Console PS3; February 2010; America 329,034
Console X360; February 2010; America 405,082
Diff: 76K (360)
I think the rule of thumb is USA = 80% of Americas, so expect the difference to come in at about 61K (or 19%). Statistical tie between the 2 consoles could be as much as 10% so a 19% difference is well outside the margins of sampling error. A clear win for 360 is fully expected and anything less than a clear win would be a big surprise.
NPD January was somewhat of a surprise for some people because:
Console PS3; January 2010; America 497,530
Console X360; January 2010; America 497,275
(these might be post adjustment, I don't know for sure)
So expectation was for a marginal PS3 win (though statistical tie really). With numbers this close it was 50/50 which console would come out ahead in NPD. Perhaps the surprise was the amount by which 360 came out ahead.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
