This is a few weeks old, but I finally got around to reading it:

Researchers studying a random sample of office workers and found they got an average of just 11 minutes clear time to a project before being distracted by an e-mail, phone call or verbal interruption from a manager or colleague.

It also found interruptions now took up an average of 2.1 hours of every working day, or 28 per cent of the average person's nine-to-five schedule, including the time to recover your train of thought following an interruption.

It took an average of 25 minutes to return to a task after being disturbed, according to the magazine.

Now, I am not prone to buying into a bunch of psycho-babble, but this particular statement describes exactly how I feel much of the time (emphasis mine):

Psychiatrist Edward Hallowell told Time that he had seen a tenfold rise in the number of patients with work-induced attention deficit disorder.

"They complained that they were more irritable than they wanted to be. Their productivity was declining and they couldn't get organised," he said.

Adult attention deficit disorder took hold "when we get so overloaded with incoming messages and competing tasks that we are unable to prioritize", he suggested.

I cannot not state it any more accurately than that. And all this time I thought it was just sleep deprivation.