Hm, Where did that 70% number come from... grrr... ah, found it (a more recent version of the chart I'd filed away several years ago). It includes conversion losses which are considerably larger.
The document you linked to didn’t open. Could you post a working link, please?
BTW, I find that the price system provides an excellent first-approximation of the resources used in anything. (Provided we’re talking free market — subsidies, excise taxes, etc. distort things.) IOW, the metric I’m most interested in is $/mile. If electric energy, where the rubber meets the road, cost less than gasoline — then, electric vehicles deserve a closer look. I don’t need to concern myself with transmission losses, etc. — just the cost to me. The next (and huge) consideration is whether the savings on electricity vs. gasoline will pay for the batteries, and other incremental costs of an electric vehicle. Finally, the range, time to charge, etc. need to be factored in. For some users, these will be deal breakers; for others, they won’t be much of an issue.