"This equalization is not fueled by a drastic decrease in the number of hours that consumers are spending with offline TV, which has remained relatively stable over the past five years. Instead, the leveling is driven by the huge growth in time spent with the Internet," said report author and analyst Jacqueline Anderson.

The survey also found that 91% of all online households were using broadband. That represents about 85.9 million of 120.2 million American households total, Forrester said.

As for what they're doing online, 92% use e-mail and 60% are using the Internet for e-commerce, the survey found.

And as for mobile, the percent of mobile users who report texting on a monthly basis jumped from 54% to 61%, with growing numbers of older users now communicating beyond phone calls alone, Forrester said. Meanwhile, 25% e-mail via mobile and fully 52% use their mobile phones for directions and maps.

How about for financial activities? Only about 7% said they used mobile devices for that purpose in 2010, but that's almost double the year before.

Don't just look at current numbers, the report's author advises.

"You may think knowing that 67% of online Gen Yers maintain a social networking profile isn't important if you're a financial services company focused on helping Boomers with retirement plans." Anderson said.

"By the time Gen Yers are in your target market, Facebook may be a thing of the past, right? This may be true, but the sociological factors driving Gen Yers to use these social sites are important and will help you understand what they'll expect from you when they're ready to retire."