Wow. When I read that fact in a recent piece on time management by Dr. Sandra Scott Simons in Emergency Medicine News, I was a bit taken aback. It's not surprising once you really think about it, but at first, it's a slap in the face.
In her article, Dr. Simons' discussion of the pitfalls of distractions is particularly resonant for me. If you haven't already, make sure to familiarize yourself with the concept of Deep Work by Cal Newport. (He has a book, a podcast, you can also find many interviews of him online.)