IDC on Tuesday gave its own breakdown of world tablet share from this fall and painted an optimistic look at Android's position in the market. Going higher than others' estimates, the research team believed that Amazon shipped 4.7 million Kindle Fires, or enough to stake out 16.8 percent of tablets worldwide. Along with a slight gain from Samsung to 5.8 percent, the prediction would have knocked Apple down from 61.5 percent last summer to 54.7 percent in the last few months of 2011.
