That may be a comprehension error on my part, I thought the conversation started with the amount of electricity consumed per household. I agree the ultimate definition is your carbon footprint but if the first gentleman's house is heated with electricity and the German's primarily use gas then of course I would expect there to be a large delta between the two. I don't know what Germans typically use for home heating.
In the Pacific Northwest our climate is generally mild and my heating expenses are VERY low. Many of us just use windows to regulate indoor temperature except in the coldest months of the year so heating and cooling for me is a small percentage of my household consumption. I think my major appliances like the dryer, dishwaher, refrigerator and freezer are what drives my electricity bill.