With a new generation of workers at management levels, the gap between seniority and leadership is closing as 34% of U.S. workers report their bosses are younger than they are, and 15 percent report working under someone who is at least 10 years younger, according to a new CareerBuilder survey.

Although most respondents say working for younger bosses is not challenging, there are differences in work styles, communication and expectations.

"Age disparities in the office are perhaps more diverse now than they've ever been," says Rosemary Haefner, vice president of human resources at CareerBuilder. "It's not uncommon to see 30-year-olds managing 50-year-olds or 65-year-olds mentoring 22-year-olds. While the tenants of successful management are consistent across generations, there are subtle differences in work habits and views that all workers must empathize with when working with or managing someone who's much different in age."