In addition to being used to getting their videos for free, these teens are fickle.

FORBES: Can Google Convince Teens To Pay For YouTube Videos?

If everything comes up roses for these roads, price-earnings ratios make it to the mid- teens but no higher, a market multiple.

FORBES: Managing Money

These three behaviors accounted for 57 percent of all the crashes in which teens were at least partially responsible during their first month of licensed driving.

FORBES: Study Shows When Teen Drivers Most Likely to Crash

Unlike earlier generations, these events have taught teens to give back, not to stereotype and not to take things for granted, the study found.

FORBES: Analysis: How To Market To College Freshmen like Nike and Xbox