Apple is likely to have no trouble holding on to the tablet market in Europe, according to newly uncovered data from Context. It estimates that Apple shipped 2.99 million of the 4.05 million tablets in the western European market during the summer, or 73.8 percent. While the iPad was down from 77.8 percent in the spring, much of that gain from rivals was attributed to the rush on the clearance HP TouchPad, which wouldn't be a factor in the fall.