I planned the birth of my son for a Saturday as my DH couldn't take time off work and, given he works in Russia, getting home at short notice wasn't an option.
My son was born 2 weeks prior to his due date, but the CS was actually planned for 1 week prior (DS had other plans, which is why the date was brought forward)
I had my DS at The Portland and, IME, the consultant will NOT deliver the baby unless he feels the time is right. My CS was moved on the Thursday and DS was born on the Saturday.
While I appreciate that not everyone is going to agree with the choice my Dh and I made, it was the right thing for us and, never once, did I feel that my consultant lost sight of the fact the only important thing was the health of me / my baby.
Yes, I had a planned CS for non medical reasons, but the date and time of the CS was still governed by DS.
I say good luck to her.... my second baby is due in August and I'm DEF having another El CS.