I don't see what's misleading about it. AC vs. DC has nothing to do with which direction power is flowing, which is what they're talking about. And feeding pow

I don't see what's misleading about it. AC vs. DC has nothing to do with which direction power is flowing, which is what they're talking about. And feeding power to the "grid" is actually quite straightforward, at least for the customer's equipment. In effect, you can think of the 60Hz oscillations of AC voltage as being like an enormous rotating crankshaft that each customer is tightly coupled to. Correctly applying a "torque" to that system automatically distributes the energy where it's needed. In contrast, de-coupling and re-coupling one house with the grid on demand is a lot more complex: you lose the stabilizing effect of the grid's enormous "inertia", and you have to carefully synchronize the phases when reestablishing the connection.