I've seen no evidence to support that thesis. Do you have information not available to the rest of us?
Half of the success is showing up, and she seems to be very good in that. She's talented to put up a show, may be like The Donald. There is no evidence of any particular skill other than the aura she projected which apparently fooled even people like you.
There is not a single good decision I can think of she took when she was at Yahoo. What Yahoo needed was surgery and re-invention, a surgery which might have even killed the company. Instead what she gave was band-aid and placebo.