Reading the comments over at Matt's place it's interesting that some people see those two pictures and think it's a comparison of a dense urban neighborhood like mine and a suburb. The pictures aren't really making any density comparison, they're simply comparing road layouts. And, roughly, it's a comparison between older streetcar suburbs and similar with newer (last 30 years or so) development.
It's not about density, it's just about whether you're building single access point neighborhoods or not.
