That's nice.

The study picked 50k people who each average 2 or more calls per hour for a six month period and make at least one call for every hour of the week. That's a lot of calls.

If anything, the main criticism should be that people who make that many calls are not a representative population...

Who needs to run around a university bookstore stockroom when you can torrent your texts? The more popular these e-readers get the "cheaper" textbooks will become.

More than worth losing the used books market....