Outside Online published a story backed by science that concluded that youth may not be the best indication of potential success. In sports and business, it is actually more common to see peak accomplishments a bit later in life.
I think the importance of experience and wisdom is a huge contributor to success. It's one thing to have youthful exuberance and the belief that every undertaking can be conquered with desire and effort, but age lends a perspective that injects measured caution, stability, vision, and broader focus. Learning from mistakes and the mistakes of others is pretty valuable.
I'm glad to see that science has backed up these opinions.