I don't think she was appointed to inspire the cadets because as far as I can see, apart for a select few, it hasn't been publicised within.
My daughter has been an Air Cadet for well over three years (she's now an SNCO and very keen to join the RAF as a career) and she hasn't been made aware of Ms. Vorderman's role or even who she is.
She will be
Shy, have no doubt. The announcement was only formally made on (I think) 20th November, and her (CV's) programme is in its very early stages.
She is keen to do lots and I'm sure she will.
It's been all over Air Cadet websites and social meeja, and promulgated down the Chain of Command. But you can never guarantee info being passed on .......
Did she know about Chris Hoy?