When I travel to the US, it feels like they're serving way to much food, from an urban Canadian perspective. The portions just look huge to me, but apparently this is considered normal.
When I eat with my parents-in-law (who are perfectly fit), their portions look small and unsatisfying to me. I'm about 20 pounds overweight. When I eat their portion size, I don't get hungry -- it just feels like I'm being shorted.
We need to re-calibrate.