Want to know which tablet drives ecommerce? Look no further than the results of Black Friday shopping activity. The results are in, and according to the IBM 2012 Holiday Benchmark report, iPads drove 88 percent of all mobile Web traffic and made up 10 percent of all online shopping activity (including PCs). Numbers two, three and four? The Barnes and Noble Nook at 3.1 percent, the Amazon Kindle Fire at 2.4 percent, and the Samsung Galaxy at 1.8 percent (specific models not specified). The report is based on data from 500 U.S. retailers which see more than a million online transactions per day. [Source IBM]