Earlier quoted context omitted.
Growing up in Iowa (wide spaces, no traffic) my primary unit of distance was and still is living far away from home, time. Everywhere I would want to go would be 5,15,30,45,60 and further increments of 30 minutes after that.
Same for me growing up. The weird thing has been my time in NYC with mass transit. In my earlier days, driving 30 minutes to go to a specific restaurant in another town felt like such a lift. Now? 30 minutes on the Subway, even standing room only seems normal, even though I've only gone a handful of miles, not 30 miles.
(In steady state, of course, I expect someone's first 30 minutes on the NYC subway to be a shock if they haven't experienced it already.)