Pity the tortoise in the 21st century. Stolid, careful, slowly-but-surely… the ways of the tortoise seem quaint in the face of an onslaught of hares running amok , whether creating new businesses (Facebook, Amazon, Alibaba) or disrupting old ones (Uber, Roku, Coursera).

But remember, in the classic Aesop's fable it is the plodding tortoise, and not the speedy hare, that crossed the finish line first.

Is it possible that the tortoise could still win today? And what of the hare — so quick but impulsive and unschooled, calling to mind the ‘all-nighter’ young executives at the helm of companies today? How important is experience, and even age, to successful leadership in an era where speed has become a business goal in and of itself? The answers may surprise you.

There’s no denying the need for speed. Start-ups spend more time on “pivots,” a fancy word for changing direction or business strategy, than ever before, while incremental improvements are probably the best we’ll ever see from more bureaucratic companies. But the devaluation of experience — and that means age, too — has gone so far that wisdom has fallen out of the very definition of business intelligence.

The arrival of the Internet era has meant youth has never been more highly valued by the business community. Silicon Valley companies — every second one seemingly started by a Harvard University dropout (Microsoft founder Bill Gates; Facebook founder Mark Zuckerberg) — are not only reinventing how businesses are run, they are also leveraging their success to breathe new life into how philanthropies are run and how governments should be run.

After all, when Zuckerberg calls US President Barack Obama to lecture him on the abuses of the US National Security Agency — never mind the irony of this coming from the creator of a company wholly-dependent on people revealing private information about themselves to public audiences — all bets are off. The hares are surely running away with it.

The danger of generalising

Except for one little, but very important sleight of mind.

One of the most enduring human biases is that we tend to generalise from very small sample sizes. So there’s Zuckerberg, Gates, the Google guys, Jack Ma of soon-to-IPO Alibaba, and a bunch of other successful entrepreneurs who made it big in their twenties. But what about the tens of thousands, maybe hundreds of thousands, of other twenty-somethings that have failed as business builders?

Don’t believe me? The crowdsourcing fundraiser Kickstarter helped raise money for more than 19,000 business ideas in 2013, the majority of which were set up by people in their twenties and thirties. But how many actually created going concerns, let alone became profitable? Venture capitalists have built an industry on the premise that they only need to win big in one out of every 10 investments. Even TV shows like Dragons’ Den or Shark Tank demonstrate how few young entrepreneurs can really make it.

The new business failure rate in the US is so high — 50% fail within 5 years, according to the US Bureau of Labor Statistics — that organisational sociologists have been calling the phenomenon “the liability of newness” for decades. Not all businesses are started by young entrepreneurs, of course, but that’s what most people believe. Even venture capitalists prefer younger founders.

So, youth dominates in entrepreneurship as it does in the wider culture. Does it also influence the decisions big companies make on talent? That’s not a rhetorical question.

It’s not a good thing to be over 50 years old and working in a big company. When redundancies come, you’re often first in line to go because you’re more expensive. Ironically, one of the reasons there’s been an upswing in start-ups from entrepreneurs in their fifties is that they didn’t have a choice. Once you’re unemployable, you have to figure it out for yourself.

Experience counts, really

I think it’s time we counted up the real losses that arise from the devaluation of experience, not just for older workers and managers caught up in the societal meme but for the businesses that are left behind, required to fend for themselves with one hand effectively tied behind their back.