LOL! I've never lived in a (very) big city, but my hometown has 400 people and the small town ones are SO right - esp. the one about Don't speed or I'll tell your mother"
More Small Town Ones:
*Your bus ride to high school takes more than an hour
*There is a big to-do whenever a new house is built.
*People wave at you when you're driving down the street.
*You can ask any given person in town where any other given person is at the moment, and they can probably tell you.