Bingo.!
It sounds like the insulation contractor installed the Kraft faced batt insulation back wards. As in upside down. The stapling flanges are on the moisture retarder side, that side goes up flat against the subfloor with no cavities or breathing room. It is held in place that way by insulation wires that snap in between each joist.
The author states that she pulled down the insulation that was "stapled". The only way I know someone could staple it would be before the subfloor was installed, or upside down.
I realize that everyone makes mistakes, but this apparently happened several months ago and has got by everyone involved to end up being published in our trade magazine. And the kicker is she is now calling on all of us to get some insulation laws changed.