Just a quick question. You say the USN trains not to trim into a deliberate Stall. Did you mean inadvertently, or deliberately? I might sound pedantic here, but as a training issue, once all the other parameters are in place, including sufficient altitude to recover, why would an assist from the trim wheel be out of place? Especially across all types in the Inventory?
Others have already addressed this, however, when a pilot is learning about the stall characteristics of a particular airplane, he should trim for some speed higher than the stall speed in the configuration under examination. That way after the stall, or approach to stall, is experienced, the pilot needs only to let go of the controls and the plane will fly itself out of the stall. If you trim into the stall you might have a hard time getting the trim back to an acceptable level, particularly when the trim rate is slow. That's what happened here.