I was a proper freaky child, reading at 2, discussing everything by 4, bilingual at 6 (although that had more to do with moving to France), outperforming all my schoolmates in what was a second language by 7, etc etc... Went all the way through the French education system performing well, whilst maintaining same standards of English. Never did a stroke of work, never learned how, never had to. Did well, went to Cambridge.
And oh my god, did I fall from grace. From big fish to teeny tiny weeny fish. It was hard. And I still didn't have any work ethic and still had the same butterfly mind I had through childhood, flitting from one idea to the next ADHD stylee. Was lucky to get away with a 3rd, but learned so so much. Will be ever grateful I was permitted to go there, even though I essentially stuffed it up.
Have gone on to do a PGCE (aged 29) and an MA (aged 36). Did reasonably at PGCE and very well at MA (seemed like very little work compared to Cambridge I have to say).
In adulthood I have learned to work. Cambridge taught me that, but only in retrospect as I was too busy partying to do any work.
However, professionally I am an utter dud. My university friends are neatly divided between those who retired years ago with massive fortunes (I;m 44 btw), those still earning ££££££££, those earning £££££, those earning ££ and the utterly jobless and largely unemployable due to social issues.
Imo a good work ethic is far far more important than frantically trying to ensure that early promise keeps paying out. Everybody finds their plateau eventually. Pushing your apparently gifted child may just result in sadness as they plateau and you keep pushing. The truly gifted child will keep learning no matter what, you only need to feed them and give them time. The merely precocious will plateau out eventually.