AT&T's U-Verse television service is ahead of schedule in adding subscribers, according to John Stankey, the company’s president and chief executive of telecom operations. AT&T planned to add one million U-Verse TV subscribers by the end of the year. The company will hit that benchmark next week, Stankey said. “Operationally, we’ve hit our stride,” he declared. The company plans to make the service available to 17 million homes by the end of the year.