Unless I missed it, the author fails to mention the other front line in this battle: the airplane. Sure, the roar of the engines can be deafening, but the cellphone ban more than offsets that. I've found that more than anything else flying reminds me of just how productive you can be when free of distractions. Heck, the nature of productivity itself changes: instead of measuring it by how many emails you've answered,…
Other times you've got shrieking babies, large groups of school children on a field trip, people having inane conversations (loudly, to be heard over the background noise)... basically all the noise you could potentially find in a train car and more. Then there's the security announcements, unavoidable ads for products and the in-flight TV service... plenty of potential for distraction.
On a long flight, especially in the morning, it can be quite nice. But you also may be stuck next to the loudest baby you've ever heard, so loud that you cannot reasonably concentrate, for hours at a stretch.