the data are about right cause :
"Looking at the year to date, the picture looks much rosier for Sony. Taking all 21 weeks of 2008 into account, sales of PlayStation 3 in the UK are 10 per cent ahead of Xbox 360."
our data from the beginning of 08 to today for uk:
360: 439,000
PS3:488,000
PS3 is about 10% ahead of 360 from the start of the year ,,which is same as what the article suggests.