Microsoft (MSFT) chief executive Steve Ballmer has remained silent when it comes to sales of the company’s Surface tablet. Despite its controversial pricing model, launch-day preorders for the base model of Microsoft’s debut tablet sold out in less than 24 hours. Ballmer revealed shortly after launch that Surface sales were only off to a modest start, however, and the executive chose not to elaborate with any figures. If we are to believe data from advertising network AdDuplex, the Surface tablet is the most popular new Windows device. The firm saw traffic from almost three thousand different Windows 8 and Windows RT devices in a single day, and notes that Microsoft’s tablet was the most popular device model with 11% of all traffic, while HP (HPQ) was the most popular vendor with a 24% share.