Let's not forget that S&P was down ~40% in 2008. So you are correct that long term average is ~6%, but then you have years like that, kind of makes the long term average meaningless. Don't forget your financial adviser took a cut on your losses in 08 as well.
At $600 a year is pretty cheap in comparison to what other trading tools. (news letters, chat rooms). This isn't necessarily for people looking a retirement fund.
I'm also marketing something cheaper http://www.strategic-options.com/trade/alerts but this is for people who trade semi-regularly. I'm not sure if you fit in that marketing demographic. However, you can see from the website some stocks like Amazon have return far greater amount than the $600 initial cost.
This new ETF / index strategy is nice, I working on a portfolio that would only trade ETFs. That would charge only 1.25% of AUM. But that's still in the works...