According to a new study of consumers conducted by The NPD Group, 11 percent of consumers are likely to purchase an iPad by February 2011. Citing a NPD “fact sheet,” AppleInsider reports that the survey also found that iPad usage increases with length of ownership; consumers who owned an iPad for two months or less use it for around 15 hours per week, a stat that increases to 18 hours/week in those who have had their iPads for more…