Tyler Cowen points to a bit of text from David Kessler's The End of Overeating: Taking Control of the Insatiable American Appetite:
According to Gail Civille, in the past Americans typically chewed a mouthful of food as many as twenty-five times before it was ready to be swallowed; now the average American chews only ten times.
Drum wants evidence and tests himself. My oldest beagle inhales her food so far as I can tell.
The Dish 