What percentage of American children live in poverty? According to the National Center for Children in Poverty, 16 percent of children (20 percent of children under age six) in America live in poverty. The child poverty rate in America is often two to three times higher than that of other major industrial nations. Poverty is defined as living in families with incomes below the federal poverty line ($21,200 for a family of four in 2008).
The main cause for tire cupping is worn suspension allowing too much freedom for the wheel to bounce and vibrate, specifically shocks/struts and bushings. If your wheels are going out of balance, this issue is greatly amplified.
If your tires are cupping it probably means that they are wearing unevenly which is a sign of an alignment issue. i would take your car to another tire shop and just have it checked out if they say there is nothing wrong with it then don't worry about it. the other thing you can do is go back to the dealership and have them explain to you or show you the exact problem and then explain that to the tire shop and see what they say if it is something you should worry about or not