Speed is affected by process, and process evolves in reaction to abuse. In the beginning, it's quick to do everything, but as people take advantage - routing contracts to friends, taking safety shortcuts - rules get put into place and those rules affect the time to complete. For New York specifically there's another factor that it's strange the article omitted: Robert Moses. Prior to the mid-1960s, it was fairly simp…
This reminds me of what Dan Carlin called "rolling the monarchy dice" in his Hardcore History podcast. If you get a good dictator, things get done with little friction, because the power rests on a single person's shoulders. But if you get a bad one, you're stuck with it. Democracy might be slower and less inefficient, but it's reliably slower and less efficient.
The U.S. was clearly designed with the second interpretation in mind. The revolution was a result of taxation by the British Parliament, and their anger at the British crown was that the king did not stop the parliament. The president / executive branch is a single person, and it represented their view of preferring an accountable monarch over distributed accountability dispersing Parliament.
They also designed the house seats with very lower upper bounds on the number of people represented by a single person, and the design of voting districts reflects a view of accountability over representation.
However, the prevailing meta game of politics is using the representation interpretation. And the design of the U.S constitution is quite bad when that is the understanding. It's just not designed for it. And the pubic has been trained, in almost pavlovian way, to interpret the "accountability" interpretation as "populism" with negative connotation.