Dont worry, you dont actually feel it when you hit 30. But I get the feeling you are talking about.

I started programming relatively late, mid-twenties, and started as a CS student when I was 28. For the first two years I had this idea that I had to be faster and better than the younger students, to have a chance. But the world doesnt work that way. What matters is to try and figure out what you actually want to do, and then spend the time it takes to do it.

Same, i'm just 26 though ;)