Outside of the East Coast, the US has an oddly scientific structure of it's cities...
No, it's just the opposite.
In several parts of the world (it's true than in Europe is more noticiable, but don't forget Middle East, Nort Africa, Far East, etc...) the cities are grow over old placements that could be traced two thousand years or more. They have their own logical layout, but the layout is related to old forgotten reasons (access to fresh water, defensive walls, etc.)
For example in my country (Spain) several of the most populated cities could be traced two thousand years, and the oldest are at least three thousand (for example Cadiz where based on a fenician settlement on the 1100ac (3117 years old).
They cientific layout of american cities is due that most of them don't have more than two hundred years, in my country even ninety five hundred of the towns in the country could be traced at least five to ten times that time. You could not compare a citie with one hundred years against one with three thousand.
You could not use modern "scientific" layouts two thousand years before most of the technology that support them where even dreamed.
And it's not only in Europe, Pekin is 3000 yers old, Varais in India 3800, Damasco 4000, several cities in Irak 3800+, serval in Israel, Palestina, Libanum again 3700+....
The oddity is the "new world", etc. not the opposite but those are countries that could not trace their history to three-five hundred years and oustide that is almost just aborigine setlements long time destroyed/abandoned.