[dredmorbius]

I tend to agree on all points.

The truckers vs. business travellers comparison was mostly me just trying to suss out what the relative magnitudes of those were. Information's sketchy, but inferences can be drawn. That was independent of your points, which are valid and insightful.

And yeah, the idea that 1) most "restaurant" meals are fast-food franchises and 2) that's not especially healthy on a consistent basis, as well as that 3) specific choices about menu items can have a major impact are ... fairly self-evident. Pity the study doesn't seem to address those, at least based on the unembargoed bits at the shared link above.