You're regurgitating exactly what the mutual fund industry wants you to think, and this is the major reason why my whole generation, except for people like me owning stocks, can't afford to retire. Many of the performance claims are so far off that you could be sued for malpractice if you were in business and claimed this.
The facts:
By Morningstar data, for the last 10 years, the average mutual fund return is 6%.
This site calculates the Compound Aggregate Return for the SP500:
http://www.moneychimp.com/features/market_cagr.htmIn constant dollars and with dividends reinvested, and return since 1871 is 7%. Seven percent. Not 10 percent or 11 percent or what charlatans like Dave Ramsey want you to think. But SEVEN percent.
And it can be worse than that. For the people I worked with before I retired in 2000, the return in constant dollars has been 1.91%.
Between 1969 and 1984, the return in constant dollars was 0.36%.
Because of this, the average return since 1970 is not even 7 percent. It is less than 6 percent.
The difference between the real 6 percent return since 1970 and the claimed 11 percent is SIX TIMES THE MONEY. Over 20 years, the difference is over TWO TIMES the money. And that's why most of my generation can't afford to retire.
Snake Oil.