Sharyl, until and unless all this data is correlated and presented, in a verifiable fashion, in a way that a 12-year-old can grasp, they are all going to get away with it.
But how many know, right now? I'd guess less than 0.5%.
/rant over
Sorry for the length. I am just so convinced of all the good things that would happen if all the things in my first few posts actually happen, soon.