With all the the iPhone 3G S mania, Nielsen thought it might be a good time to dig into just who the “typical” iPhone owner is, finding that they’re not just the young, early adopters one might expect. Of the roughly 6.4 million active iPhone users in the U.S., the majority (53 percent) are over 35 years old. There are even more users over the age of 55 (17 percent) than in the 18-24 year-old age bracket (13 percent).

iPhone owners are also more affluent than the typical AT&T (NYSE: T) subscriber: 40 percent have household incomes of $100,000 or more, in contrast to just 19 percent overall. (Which makes sense, since the phones and their plans cost more—but also in light of the fact that the majority of users are older and likely better off financially).