I would say the true design intent is to evenly split and accelerate the total available gas flow so that the turbine nozzle sees a near constant mass flow. Pulsed flow to a turbine just results in pulsed acceleration of the turbine.
i just don't see how alternating one half of the turbine nozzle getting a pulse and then the other half is really what the turbine wants. It just seems it would work best on a constant pressure manifold