Apple tablet sales may have been lower this past quarter than analysts expected, but usage of the tablet remains strong. According to a recent Chitika Insights report, the iPad accounted for more than three quarters of all U.S. and Canadian tablet-based Web traffic in April. Chitika derived this traffic data by sampling tens of millions U.S. and Canadian tablet online impressions across its ad network during the first week of April 2014. The iPad is the dominant tablet in North America with a mobile web traffic share of 77 percent as compared to 8.3 percent from number two Samsung. Amazon's Kindle Fire de
