This looks like a re-hash of the findings published in a 2008 book by Malcolm Gladwell called "Outliers - The Story of Success". He's the one that made the 10,000 hour theory popular.
https://en.wikipedia.org/wiki/Outliers_(book)
Its a #1 Best-Seller on Amazon: http://www.amazon.co.uk/Outliers-Story-Success-Malcolm-Gladw...