> Shotwell rarely comments, but when she does, it's taken rather seriously
That's for sure. Elon can spout whatever he wants and space reporters, etc, will be like "Ok, Elon says this, but temper your expectations". When Gwynne Shotwell says something, the response is usually pretty much "Ok, this is happening."
Anyone who scratches the surface of SpaceX knows she's an absolute force.
Elon says things during press conferences ranging from semi-ridiculous to full on crazy and Shotwell rarely comments, but when she does, it's taken rather seriously.