I'm not sure I understand what you're saying? Walkable and urban aren't necessarily the same thing, a lot of streetcar suburbs are very walkable but not exactly urban. Wendell Falls (and Briar Chapel in Chatham county, same company) will have like 4 villages of 1,000 houses or so, with little village centers, and then a larger town center inside the four villages. It makes a lot of sense from a walkability standpoint because it creates multiple commercial districts that will primarily serve the local residents. At the same time, it delivers the product: big, relatively cheap houses with small yards, that is really in demand around the area. People obviously want detached houses, so we might as well try for as much walkability as we can given that constraint. Better suburban design could do wonders for the Triangle.