Engadget posted a story that Apple has sold six million copies of OS X Lion

Before we get to the real meat of things, Tim Cook's just trotted out some Lion numbers -- six million copies downloaded since launch, to be exact. According to the big Apple's new CEO, that's a growth of 80 percent over Snow Leopard. Of course, those numbers would mean nothing without a little comparison. Cook says it took Windows 7 20 weeks to meet 10 percent of Windows' install base, compared to the two weeks it took Lion to reach the same portion of OS X users.

  Apple: Six million copies of OS X Lion downloaded since launch