The main point, about not washing, isn't standard dental advice and widely known, unless I'm mistaken. Personally, toothpaste tastes so bad I find it hard not to rinse without gagging.

Otherwise, the advice is direct and the writing style is of interest in itself. So many websites that provide health advice are condescending. This one is at least instead straightforward. For example, the points about fluoride concentration are not obvious and deserve a hearing. I say at least, because they should have references and make it transparent how these conclusions were arrived at.

I thought it was widely known, and in a more general form - don't eat or drink for half an hour afterwards. (i.e. after breakfast, if taken.)