[startupper]

This assertion has little to no scientific or mathematical basis.

Here's how you too can make up a sensational headline: 1) Start with an assumption 2) collect data points that prove your assertion -- leave those that don't out of the calculation.

There is no 'right' age to start a company. No age is too old.

-KFC was started by Col. Sanders when he was 50 something.

-John Warnock co-founded Adobe when he was 42.

There are many more examples, but those are only a couple off the top of my head.

EDIT: The comments in the valleywag piece contain a few more examples like Jim Clark.

[mechanical_fish]

Let me guess: most failed startups are also run by 20 and 30 year olds.

I intend to wait until I'm 87 to start my company. We all know of failed startups that were founded by 20, 30, or 40-somethings, but you almost never see a failed startup with an 80-year-old founder. I'm sure that means something.

[startupper]

Why not start one when you are 10?

Seriously though, I started my first one when I was 11 -- and no, it was not a lemonade stand ;). Profitable too.