1. There are far, far more differences between Midtown and Mabelton than urban planning (Midtown is a young, liberal, much higher than average percentage of gay residents, close proximity to Georgia Tech) and Mabelton is pretty much in the opposite direction in every way possible. It is an apples to oranges comparison.
2. A huge advantage of cul-de sacs is that people don't speed down them like they do on residential connective streets, which is a huge plus when you have children of a certain age.