Well, that's a good explanation, but it would be great if you can really reveal how you come up with the data unless that is some proprietory thing.
Another thing, I sugges you add some sort of disclaimer on the figures that is ahead of the NPD ones to tell people that the data is still provisional and is likely to change. Like what you used to do with the Japanese numbers just so people don't whine/grovel/bitch when the figures do change, which is quite likely at this early a stage. Actually, this sort of disclaimer should be used on all the figures on the site just to save you future headaches since errors do occur.
Later today should be the first test of this new method.







