I am Dutch and moved to Canada about 20 years ago (my wife is Canadian). Imagine our first meal at my new in-laws, and me not speaking much French yet (we're in Quebec), and still wanting to show my appreciation for the meal...
> Here we ask whether, in a task where gestures are particularly useful—namely, spontaneous demonstration in which no real object is present—speakers of a high-gesture (Italian) and a low-gesture (Dutch) culture show similarities or differences in how they teach to adults versus children.
I don't think these are special as in rare, but they are cool. Many countries have gestures for the same thing. In portugal you pick up the ear lobe with your index finger and thumb, stretch the other fingers and pull it a few times. It means tasty also. You may accompany it with saying "it's from here", as in the food "is from the earlobe" which means its good, but mostly its done silently.