DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/2hmz3g/north_american) has announced the addition of the "North American Broadband Tracker: First Quarter 2015" report to their offering. During Q1 2015, North America's residential broadband subscriber market increased by an estimated 1.3 million subscribers or 3.7% compared to Q1 2014. In the US, an estimated million subscribers were added to end Q1 2015 with an estimated million subscribers. Cable opera