A new study by mobile advertising analysts Millennial Media finds that Apple's iOS is again the dominant platform for ad impressions, a measure of the effectiveness and engagement with in-app advertising. The report found growth in ad impressions across platforms and manufacturers, apart from BlackBerry which continued to shed users. Apple again swept the hardware results, taking the top manufacturer, top smartphone, and top tablet. Google's Android platform, however, continues to make great strides in growth.
