Is it just me or is anyone else getting tired of people using one tracking firm to argue that another tracking firm is over-tracking a system they dislike, and undertracking a system they like?
The fact of the matter is that all tracking firms have margins of errors, and it is quite possible that one tracking firm could be 2.5% below the real number of units sold and another traking firm could be 2.5% above the real number of units sold; this would result in the gap between the two firms looking (fairly) large at 5% but neither would be that far off of the real sales.
Realistically, the best way to know how much hardware has been sold over a given timeframe would be to wait for the companies to release their shipment numbers; the number of systems shipped for a system in a fiscal period should be (roughly) equal to the number of systems sold if the volume of stock in warehouses and retail stay (roughly) equal.
