One out of every three U.S. teenagers plans to purchase an iPhone within the next sixth months, according to the results of the latest Piper Jaffray bi-annual teen survey. Fortune reports that 33% of teens said they planned to purchase an iPhone in the next sixth months, up from 22% the year before; however, the 14% who said they already own an iPhone is down from 15% in 2009. The iPod’s share of the teen MP3 market also dropped from 87% a year…
