http://www.npd.com/press/releases/press_091105a.html

According to NPD’s weekly tracking service**, Windows 7 software unit sales in the U.S. were 234 percent higher than Vista’s first few days of sales. Revenue growth wasn’t as strong though. A combination of early discounts on pre-sales and a lack of promotional activity for the Ultimate version resulted in dollar sales that were 82 percent higher than Vista.
Oh yeah!!!