That depends on how you look at it. Thomas Jefferson would be surprised and appalled at how urban the New York to Philadelphia corridor (stretching out beyond those cities in both directions) is. What the futurologists missed was that most of the cities growth would be outside of the three megalopolises, but it was a great surprise for anyone who'd grown up earlier in the last century to see the first pictures from space.
I meant to say, “most of the country’s growth.”