YES! Age IS, in fact, just a number. Age is not a defining factor of anything...it can not determine how intelligent a person is, how mature they are, or anything else about them. Being young does not mean that you are immature and stupid, and being old does not mean that you are slow and boring.
I'm 17, a month from 18, and I wish I could drill this concept into people's heads. When I mention wanting to be treated like something other than I child, I always get the response: "You'll be 18 in a month...just wait." NO! I won't wait. 18 is just a number...I'm not going to wake up any smarter or more mature than I was the night before. It just doesn't happen like that...Why would I suddenly get treated differently one day over another? Sure, I will obtain more power in society, but that's it. Overall, like I said, it IS just a number. I doesn't make us who we are, WE make us who we are.