What people actually listen to

Instead of what they say they listen to. [Link]

American men have a naughty little secret. Sometimes, they like to relax with a little Céline Dion. Professed classical music fans have one, too: as it turns out, they don’t tune into classical radio nearly as much as they claim.
These are two of many findings shaking up the radio industry as it converts from measuring ratings through surveys to monitoring listeners electronically using so-called Portable People Meters.
As radio executives are discovering, what people say they do and what they actually do is different — especially where “My Heart Will Go On” is concerned.
That more men are mellowing out to Air Supply than are willing to admit it is a curious discovery, but the new system has serious repercussions, especially for classical radio. When 12 major areas, including New York and Los Angeles, switched to the system last year, classical radio’s market share fell 10.7 percent in those areas, a significant drop, according to a study by Research Director, a ratings consultancy.

I wonder how these devices handle when people listen predominately on headphones?