My sample of three is not representative at all. These are individuals I have found through my browsing of the internet. If these individuals stick to their new found strategy for the next 20 - 30 years, I believe they will have high odds of succeeding. If they switch strategies however, I would be worried for them.
For my strategy, I want to earn a certain dollar income say after 2018. Dividends are a more stable, and more reliable way of living off a portfolio. Since I receive cold hard cash every 90 days or so, which also increases every year, I am more likely to stick to my strategy. It is easier to ignore stock price fluctuations, when stock prices are flat or low for extended periods of time, when your expenses are covered by dividends. I would not want to be in a position to sell shares when I need the money, and shares are flat or down for extended periods of time. I know I would hate it, and I would end up watching and stressing out over meaningless price fluctuations. However, for some retirees in 1966 - 1982, stock prices went nowhere for 16 years. Between 1929 - 1954, stock prices also went nowhere. If you only rely on capital gains to bail you out, you risk running out of money when stocks are not in favor and their prices do not go up every year. You risk running out of money if you expect to sell 4% of your portfolio each year, it has a low yield, and stock prices are flat for extended periods of time.