It turns out that kids who have spent years playing video games learn to use complex information systems more quickly. The U.S. military reports that new recruits pick up the use of highly specialized and complex data systems easily, compared to youth in other countries, where some of the same systems are exported and in use.
Well, that's a bit of good news. Unfortunately, those same kids can't balance a checkbook or calculate a tip after a good meal in a restaurant. I guess that's why some cellphones come with a "tip calculator" built in, which has always seemed redundant to me since virtually all phones come with a calculator. But I guess a "tip calculator" relieves you of the heavy responsibility of understanding percentages and how to multiply.