Twenty four weeks? What do they find to pad that out? The 18 weeks we did was more than enough given that it involved no professional training at all but was simply a series of hoops to jump through to ensure you deserved your commission, had a semblance of an idea of leadership (not something that's required all that often for aircrew for a few years) and knew how to behave (sort of) in the mess. The important stuff you learnt afterwards in your professional training.