A new study by the Reynolds Journalism Institute suggests that iPad ownership happiness was even higher than it was just this fall. Having already understood that 94 percent of a group of 1,6000 iPad owners were either somewhat or very satisfied late last year, about 70 percent of a 561-person follow-up group was more satisfied again. Only four percent were less satisfied, and 81 percent said they didn't expect to buy a rival tablet in the next six months.