It is like saying that at the age of 8 I have to come to terms with the fact that my ds doesn't have a great work ethic and that he won't learn how to attain one.
No I don't think it works like that. It's more like a switch and all you can do is encourage & support. For some people the switch never turns on, for most it turns on and off for spells, for some it turns on & never switches off. Maybe there are special magic triggers, but I've yet to be convinced what they are. In some cultures the trigger is believed to be nagging and even physical violence; a parent is neglectful who doesn't berate or smack to make their child work hard. Our culture sneers at those tactics, but doesn't have anything more successful to offer.
Matthew Syed seems to believe that nothing is innate & everything can be taught: intelligence, speed, power, artistic talents whatever. The flip side of that (saying this as an American whose culture broadly agrees with Syed) is that when you don't succeed it is YOUR FAULT. Because you didn't work hard enough. It's terribly depressing outlook, actually.
Also, no one openly laments when their child is obviously not the prettiest/cleverest but many lament when their child isn't the hardest worker. I don't get why hard work isn't seen as equally innate.
I come from a family with some criminal elements though, so I have a completely different idea of what it means to be successful in life than most MNers.
(Stepping off soapbox now).