Fast Track at IBZ is terrible for two reasons:
1) As soon as the gate is called, people walk to the gate and start queuing. I've never known why passengers do that? Surely they know that BA flights are boarded by groups (at least normally). As there's only a single way past the gate, I notice the official don't bother with CE priority. I didn't queue, but walked to the front as soon as they started allowing people through.
2) You're hoarded on to a bus and they get about 40 people on there, they they all get off the bus and it's a free-for-all onto the plane. No business priority at all.