You can bet your bottom dollar that she would have had an experienced 'passenger' with her if/when it was given to her.
Unless the aeroplane is a designated multi-crew aircraft, you cannot fly a display with a passenger on board. This has been the case for a considerable period of time. I'm not sure why you feel the need to cast doubt on TCT's DA? The displays that I saw were safely flown and showed the relevant aircraft in a manner appropriate to the the type. Revalidation of a DA takes place on a roughly annual basis, so competency is continually monitored.
Unless you have personal experience of TCT's displays (have you watched many of her displays? Or any at all? How about flying with her in a formation display?) you might want to stop this line of commentary.
Like I said, I know she has held one. I don't know if her DA is current, but being rude about this particular aviation accomplishment is avoiding the core issue originally raised.