Over the past decade, advertisers have spent untold millions trying to turn Talia Kocar and her peers in the millennial generation into loyal customers. But on a recent afternoon in Santa Monica, Calif., in a kind of consumer torch-passing, Ms. Kocar, 25, watched a focus group of teenagers drink free Snapple and suck Doritos powder off their thumbs while answering questions about their smartphones.
Ms. Kocar works on Wishbone, a social networking application full of breezy polls about pop culture, prom dresses and other fixtures of teenage life. Users - most of them girls - post side-by-side pictures that compare rappers (Lil Wayne or Tyga?), celebrities (Kim Kardashian or Beyoncé?) and the like.