Interesting stuff from latest Pew survey in the USA :
Over half of the adult internet population is between 18 and 44 years old. But larger percentages of older generations are online now than in the past, and they are doing more activities online, according to surveys taken from 2006-2008.
Contrary to the image of Generation Y as the "Net Generation," internet users in their 20s do not dominate every aspect of online life. Generation X is the most likely group to bank, shop, and look for health information online. Boomers are just as likely as Generation Y to make travel reservations online. And even Silent Generation internet users are competitive when it comes to email (although teens might point out that this is proof that email is for old people).