Entroper on 13 August 2007
+/- 15% is probably about right, they shoot for within 10% accuracy each week.
It is worth pointing out that this is the error margin for the current week only. The error margin for the total sales is extremely small, since figures are adjusted as more and more information comes in. I believe when we analyzed Q1 reports from Sony, we discovered accuracy of within about 1% for total PS3 sales as of the end o that quarter.
