Obviously we know who will go, but such a selection does not earn much money via the phone bill for BB6. They need closer selection and a greater wind-up.
Since science seems to cause love or hate in a lot of people this might not be so predictable. Obviously, the science fans will vote orlaith out, but generally speaking does she create that much of an interest either way so anyone can be bothered to pick up the phone. The problem for science is the ones who can't stand him who might be itching to pick up the phone. I don't think this is as definite as people think.