While Microsoft chief executive Steve Ballmer says the company has sold over 4 million Windows 8 upgrades since launch, data collected by Web analytics firm Net Applications suggests adoption of the new operating system is much slower than that of its Windows 7 predecessor.
Data collected during the week ending November 18 — three weeks after the operating system’s retail release — puts Windows 8 usage at just 1.19 percent, behind not only Windows XP, Vista, and Windows 7, but also Mac OS X 10.8, 10.7, and 10.6, and even the underdog of operating systems, Linux.

Full Story: Web data suggests Windows 8 adoption slower than that of Windows 7 | ZDNet.