I read the article above yesterday and felt, for the first time, like I'm past it, over the hill. I should point out that I am 30 years old.
The article makes it clear that if you are cycling competitively, explosive power and speed is your strong point in your twenties, not endurance. Which is good to hear, as I think I lean towards endurance and stamina-testing bouts of physical exercise.
I suppose more than anything, the article made me feel like I'd missed out on a lot of two wheeled excitement over the last decade. Truth be told, I've been cycling since October 2006 when I was 24, but I was just getting back into it and really just riding for the enjoyment.
The next article about training/riding in your thirties was published today but I haven't read it yet. I think I'll save it in Pocket or my biking Springpad notebook and comment later after reading thoroughly and contemplating it's advice/wisdom/foolhardiness (delete all applicable).