Scott "Dilbert" Adams says so:
If you look at the great achievements in history, they are usually accomplished by younger people. Those people continue to acquire relevant experience throughout their careers but their successes do not continue at the same rate. For anything important, experience probably has a strong negative correlation with success. If that weren’t true, all the hit songs, hot startups, and new inventions would be coming from geezers.
Yes, but the ideal situation is some experience but not too much experience. To quote an old post of mine:
We theorized the best time to start a company was around age 27. On the one hand, you have acquired enough knowledge and experience to do something meaningful. On the other hand, you aren’t weighed down by the baggage of too many experiences and the tendency for such baggage to reinforce preconceived notions. And you aren’t overly jaded. And you probably don’t have a family to care for. Also, when you’re 27, you’re still free from the status worries that bedevil adults — you don’t give a shit what the neighbor thinks.
(hat tip Jeff Nolan)