Despite what some skeptics are posting, your concept is rock solid.

Putting 30% in stocks as Jon states is not an option in most cases. Someone who is 65 years old today is not that far removed from the last depression which means that he/she would rather stick their money under a mattress (or stick needles in their eyes) than experience the risk of losing a dime in the markets.

As far as your return estimate, I still say it's bang on. First of all, money market funds are not guaranteed as one skeptic claimed. A vast majority of Americans/Canadians get zilch on their bank accounts much less the 4+ you were stating or the 5% or 6% that is avaialable at some obscure financial institution run by Guido out of his basement.

Lest we forget that as the Fed drops interest rates like Britney Spears drops babies, returns on short term savings will continue to deminish.

Keep up the great work Nora. I enjoy all your articles.