Superior productivity of youngsters is bunk.
Recent studies apparently prove that workers in their 20s using a variety of digital tools at the same time are not any better at multi-tasking than anyone else.
The human brain can't concentrate on two things at once. So multi-tasking slows you down and increases your mistakes. Also, any interruption encourages further distractions from the task at hand.
"In a recent study at Microsoft "workers took, on average, 15 minutes to return to serious mental tasks... after responding to incoming e-mail or instant messages. They strayed off to reply to other messages or browse news, sports or entertainment Web sites."