For the record, since the thread was started the Vanguard Total US stock market index fund is up 29.8% including dividends. Ticker VTI.
over the 2.28 year lifespan of the thread, that's 12.07% per year, annualized.
For the factual record, the s+p 500 closed at 1,709.67 on 8/2/13 (date thread began) and is presently 2,203.02. An increase of 18.33%. Which is less than 20%, as I noted.