Well, I'm 35 and my progression gained momentum after 30, before the 30s everything new took time to get into because i had this idea i had to know everything about everything to be good. But now its a lot easier as i've build up quite some experience on how to fail and succeed.
Programming wise and learning wise i've also grown wiser and know where to have my focus to be able to get better, faster and learn new technologies with my own mental algorithm. Though this most likely has nothing todo with being over 30, but maybe more with the time and experience gained over time. But as you get into the 30s, some people get kids and buy a house and what not. But that will also in time teach you how to manage the time you have available, and you will try to work more efficient and narrow your focus onto your goals and tasks in your everyday programming job or what you're doing, you learn to filter away all the noise and stay focused on the task at hand.
Programming wise and learning wise i've also grown wiser and know where to have my focus to be able to get better, faster and learn new technologies with my own mental algorithm. Though this most likely has nothing todo with being over 30, but maybe more with the time and experience gained over time. But as you get into the 30s, some people get kids and buy a house and what not. But that will also in time teach you how to manage the time you have available, and you will try to work more efficient and narrow your focus onto your goals and tasks in your everyday programming job or what you're doing, you learn to filter away all the noise and stay focused on the task at hand.