Earlier quoted context omitted.
Really? Who did the quantification? Citation needed. Probably you missed the "increasing body of research" mentioned in TFA then... "According to a study on the cost of interrupted work, a typical office worker is interrupted every 11 minutes. Even worse, people often take up to 25 minutes to refocus on the original task." "Researchers have found that the loss of productivity due to noise distraction doubles in open…
> "According to a study on the cost of interrupted work, a typical office worker is interrupted every 11 minutes. Even worse, people often take up to 25 minutes to refocus on the original task." So they're interrupted more frequently that the time it takes to refocus and therefore never complete any task?
More seriously though, that "every 11 minutes" figure is most likely an average, so there will be intervals much longer than that.