This was an excerpt from the article:
Did It Work?
According to former turtle Russell Sands, as a group, the two classes of turtles Dennis personally trained earned more than $175 million in only five years. Dennis had proved beyond a doubt that beginners can learn to trade successfully. Sands contends that the system still works well and said that if you started with $10,000 at the beginning of 2007 and followed the original turtle rules, you would have ended the year with $25,000.
Personally, I know of a few individuals who self taught themselves to trade. They have different background and personalities and have very different styles of trading. All of them did well enough to trade for a living... one went cold turkey - quit his job and started trading full time and making that transition almost instantaneously. Others learnt their craft and worked full time while traded part time - eventually they quit their full time jobs. The common factors amongst them was persistence and a hunger to succeed. None of them paid for a trainer but they had a fair amount of guidance from professionals that they know personally. Only one had no guidance but paid the market "tuition fees" initially before eventually becoming successful.