Ah, that's relatively recent in the literature, and I found a reference to it at the NIH[1] as well.
I'm glad for all the research into causes of antibiotic resistance, and if medicine comes up with a better way to treat infections and minimize resistance, I'm all for it.
Some people are claiming this is not supported by evidence: http://www.bmj.com/content/358/bmj.j3418.full
Previous HN discussion: https://news.ycombinator.com/item?id=15311274