A note from a friend in New Zealand I’ve been keeping in touch with over this. He’s a music buff, broadcaster and the editor of NetGuide magazine:
I have been doing Podjacking every day the last month in my morning train ride and walks to work. I was interested to researching your comment about whether all Ipodders had interesting music. I jack about four people a day on average -one morning 7. So far I have not heard anything really mainstream but then it could be that Ipodders I have come across tend to be passionate enough about music to buy an Ipod and many interestingly are 30 plus because of the price of the bigger Ipods. Music has ranged from Kronos quartet (50ish year old) to System of a down (20 something) to obscure electronica (mid 30s). The only “disappointment” was U2 (22 year old female).