This is a silly statement. For various reasons. In the first place, the only existing measurement unit for delivered electricity is the kilowatt-hour. Imagine you receive a an invoice for your own consumption stating "for delivery of so many households". Would you not think somebody had gone out of their mind? Secondly: all the electricity produced by windturbines simply flows into the general electricity grid and certainly not only to households, but also to thousands of other consumers. Nobody, even if they should live right next to the windturbines, gets their current straight from the turbines through their plugs, but simply the current 99% of which comes from power plants.
And just as well, because if not, one would not get any current at all from those windturbines for many days per year as they would happen to be motionless. The term "so many households" is nothing but an expression for impressing the public with a big and striking number. For a question on the effective yield of a wind turbine one should always demand the data expressed in kWh. You also need to ask for a graph of the produced power, in kilowatts, during the year. To control the "reliability" of delivery. The supplier will not be too grateful for such an enquiry.