Maturity and intelligence don't go hand in hand. Most of my intelligent friends act immature on a regular basis, and most of the older, 'more mature' people I work with don't display any noteworthy level of intelligence.
It's also pretty easy for anyone to act politely if they want to. Combine this with the generally accepted notion that a lot of intelligent young people are cocky and egotistical and maturity doesn't have much to do with intelligence at all (IMHO).
It's also pretty easy for anyone to act politely if they want to. Combine this with the generally accepted notion that a lot of intelligent young people are cocky and egotistical and maturity doesn't have much to do with intelligence at all (IMHO).