The real rate of return in the S&P500 for the five years from February 2008 to February 2013 hasn't been all that good, actually. Just 2.61% per year. And long term investors have had to stomach all the volatility just to get that measly return. Meanwhile investors in the Vanguard Total Bond Market Index Fund have received returns in excess of 5%, while being able to sleep at night.
Has it all been worth it, Ben?
Calculator available here.