FWIW, on the last 3 flights I took, the people sitting next to me had MP3 players; 2 jukeboxes and one flash player. As to demographics, one (the flash player owner) was a housewife in her 40s. The 2 hard drive jukebox owners (one a thirtyish businessman, the other a male post-grad student) had a Nomad II and an iPod, respectively.
Always tell the truth. Then you'll never have to remember what you said the last time.