I think he's merely stating that some of us were old enough to experience the street scene before it took a 'turn', so to speak. For example, when you were born, I was near graduating from high school. I'll be 35 this year. By that age, I had already experienced a few forms of motorsport thanks to my family and my own interest. I had already been driving for some time (obviously, illegaly ) and had learned what the street racing scene was like. Not just in one place, but everything from small hick towns to living in Souther Cali.
Things have changed alot since then, since I was 19. A WHOLE FUCKING LOT! And due to your age, you cannot possibly know from experience. I'm sure he did not mean it as an insult to anyone's age. He just means some of us are becoming old farts; old enough farts so that we can finally begin the "Age of Reminiscence".