Is age a mark of maturity?

[Obi2Kenobi]

As you can tell by the .. instead of me making up something like nihilistic triangles for no text, I was tired. (And sick... :( ) As such, I didn't have time to write a full introductory paragraph type thing. What I meant by the topic is this: Does your age matter more than an extremely small amount (so basically does it matter at all... [but not entirely]) on your mental maturity level, generally speaking. I think not, as many other factors are much more important, thus causing it to become virtulally obsolete.
BTW, I am 13. :D