The US sales figure isn't known yet, that was just an estimate at the beginning of last week.
More info about charts and sales can be found in this forum: http://forum.interference.com/f225.html
i have heard that the album could hit 5 million worldwide sales in 1 week! is this true? seems very high to me but if it sells 900,000 in US and 235,000 in UK well maybe!