Every person's starting point is really the culmination of everything in their past so every starting point is different, but this statement is born from two trends I noticed while listening:
1. "The Baby Effect" - a term coined by John Lee Dumas of Entrepreneur on Fire, a 7-day a week business podcast that interviews entrepreneurs, which evolved from John Lee noticing that successful launches tended to take 9 months from first action to the point of sustainability. He called it that because it usually coincided with the founder finding out they had a baby coming, but it also worked that way for BeardBrand, for example.
2. Most of the "successful" interviewees on podcasts state they started back in 2009, so 5 years later is now (2014). 5 years seems to be the point at which entrepreneurs have been steady long enough that they start to either a) look for the next thing or b) start sharing with other people what they know. It's also a sign that the 'wave' that they were currently riding (their business model) may have crested and they are in search of the next thing, hoping for a second win(d).
From what starting point? The decision to try to be successful, when you come up with an idea, or when you start implementing it?