I’m sure they don’t pick the final contestants based just on baking ability, but to ensure a variety of personality types and interesting people. So I suspect the auditions will wheedle out those that can’t really bake at all, but unless someone is truly outstanding, I bet the rest of the decision is based on personality (either real or whatever the producers think they can portray).
Oh, absolutely. I think we need to think of the selection process not as 'finding out who are the best bakers who applied this year', but in terms of casting, the way producers would cast a series of any other reality show.
I mean, for Big Brother they look for personalities that will cause conflict, so it's not quite the same, but the GBBO producers, as well as looking for a range of ethnicities, ages and sexes, are looking to cast for 'good stories' (did you teach yourself to bake bread when living on a remote island where you either baked or did without, or after you woke up from a coma? did your granny smuggle out family recipes on the Kindertransport?), and people who come across well on camera, and are relaxed enough to interact with one another and the judges and presenters.
No one would cast me, no matter how well I baked, because I would be completely incapable of breaking off to chat to the presenters and judges. I would just grunt. Also, I look really sullen when I concentrate. It wouldn't be warm and fuzzy TV. 