Apparently she still hasn't figured out that it's possible to invest in the entire market of stocks and bonds. Therefore it doesn't matter that most of them perform badly (by some arbitrary standard), as long as they perform well as a whole.
Hmmm...she mentioned broad investments numerous times, and talked also about how entire classes of investments worked (a few providing most of the benefits).
I was referring to her analysis of historical stock returns, where she spends 6 paragraphs out of 7 making the point that the majority of stocks historically have performed poorly (according to her analysis).