According to its data, NPR has noticed a rather significant spike in its iPhone app usage during typical morning commuter time. What makes that data so interesting -- at least to NPR -- is that, presumably, these people are in their cars. They're with radios capable of receiving
I say the data isn't so cut and dry. The sample they are seeing is only 8,000 people, which really isn't all that many when you consider there are many more people listening to NPR on a daily basis, overall. There's also this thing called telecommuting, so I wouldn't assume all of these people are in radio-equipped automobiles. There are also thousands of people who walk to work everyday and thousands more who simply don't work at all.
If you're using the NPR app and have access to an