However, a cautionary note: while teens may have their own purchase intentions, very few have their own income. The vast majority still depend on parents' largesse and may end up with a cheaper Android phone even if they intended to get an iPhone.
Furthermore, Piper Jaffray's study is actually a combination of two surveys that skew towards higher income households: one polled 1,600 "upper-income students" from households with income above $84,000, and another surveyed 3,600 "average-income students" from households with an average income of $55,000 (U.S. median income was $50,054 in 2011).
We know from other data that U.S. teens from low-income households, defined as those with incomes lower than $30,000 a year, have relatively high rates of smartphone ownership, second only those of teens in households earning $75,000 or more. In other words, low-income teens may comprise a larger proportion of future smartphone purchasers than Piper Jaffray accounts for.