Whenever they post "First Week Sales", is it actually based of true sales scanned at a register, or units shipped?
I recall reading something years ago during the boy band craze, where there would be first day sales battles between Backstreet Boys and N'Sync or whoever, and how the figures are misleading, as it has more to do with items actually shipped to stores. So, therefore, their label may be able to boast, "Well sold 1,000,000 the first week" which is great advertising, in the hopes that those copies actually do sell.
If the posted sales for the WD disc were only 1,000, then maybe this isn't the case anymore, as I would assume even nationwide in America, more than 1,000 were shipped to physical retail outlets.