Often companies will claim a "sellout" in order to hype incredible demand for its product. However, these claims are pointless without any firm numbers -- after all, there's a big difference between moving 100 and 100,000 units. Now we're getting word from Japan that the heavily discounted Windows 7 upgrades that went up for pre-order on Friday are sold-out. While no numbers are given, the 17 retailers involved in the pre-order sales who presumably have no vested interest in trying to inflate perceptions on behalf of Microsoft, report sales as "considerable" and
