Yes, of course interview preparation is very important. I was lucky that I anticipated a few questions that came up and had dot points to prompt me.
I just think that if you actually know the questions and write yourself a scripted response to them, then its no good. In a face to face, if you could script response everything, then good on you because you prepared for every possible question ever, but when the bank is so small known to many people, you want to be more than a scripted robot. I think having genuine emotional reactions to the questions, while answering them satisfactorily, would be better than looking like you are reading off a teleprompter, which I would hazard to guess a large majority of people did after they asked their friends what the questions were.
Anyway I'll probably get denied because I'm in the middle of bloody nowhere with no shirt and/or tie for 2000kms in any direction.