The average age for students starting college directly after high school in the U.S. is typically between 17 and 19 years old, with many starting at 18. Some students may begin as early as 15 or 16 if they are accelerated, while others may start later due to various circumstances, including taking time off or being held back in school. Discussions highlight the differences in educational systems between the U.S. and Europe, noting that "college" in Europe often refers to the last two years of high school. The conversation also touches on the maturity levels of younger students in college, with some participants expressing that starting college at a younger age can lead to emotional challenges and a lack of social maturity. There is a consensus that the years between 17 and 21 are crucial for personal growth, and many emphasize the importance of being socially and emotionally ready for the college experience.