From Paul Thurrott @ wininfo

For the critics who find Microsoft's claim of 46 million Windows XP licenses sold since last fall a bit suspect, here's an interesting stat proving that WinXP is making headway with actual PC users: According to WebSideStory StatMarket, a Web-based market research firm, WinXP is now the second most popular operating system used to access the Web, behind only Windows 98. WinXP accounts for 20 percent of all Web surfers, while Windows 98 is in use by almost 37 percent. But Win98 usage is slipping dramatically due to gains by XP, and "it's only a matter of months before it overtakes Windows 98 as the most widely used OS on the Web," says Geoff Johnston, the vice president of product marketing for StatMarket.