Not necessarily. I'm a programmer (not a teenager anymore), and I listen to music almost all the time while working, which is definitely more than 2.5h per day. Of course I might be an outlier, but as streaming gets more popular and easier to use, more people would listen to it in the background, like radio.
Thats what I thought of, but then I looked up average radio listening hours, and they seemed to be about 0.2 hours per person (UK figures). So I think you may still be an outlier.
Yes, but, radio listening hours? Probably the under-30 demographic only listens to the radio under duress. My knowledge of this is anecdotal only, but other than w/r/t exceptional cases (NPR, highly curated college stations), there's perceived generally to be near zero incentive to listen to the radio by everyone in my peer group or behind my peer group in generational terms (I'm thirty). On the other hand, those same people seem more or less wedded to other forms of consumption (digital music players, pandora, etc). Listening when exercising, listening in the car, listening when appropriate at work, listening while cooking dinner, listening during coitus, etc. etc.
