A new study on Tuesday from consulting firm Chetan Sharma has pointed to a very strong bias towards Wi-Fi tablets in the US. Based on data from the past summer, the most recent point at which there was a detailed breakdown available, about 90 percent of American tablets were Wi-Fi models. The results weren't split by individual model, although this was just before the launch of the Kindle Fire and would have kept Apple above 60 percent overall, based on IDC estimates.