Indeed UStik, what many call a spin or flick is actually an aileron maneuver. The Judges guide is specific, however, and calls it as the full size, ie the model must slow without losing or gaining height, the nose must drop straight at the point of stall, and autorotation must commence after the model stalls. Many modellers simply 'wingover' into a fast spiral dive without waiting for the stall, and wonder why they get a '0' from the judges. Same with a flick roll, if the controls are held the model should exit in a spin, if it simply spirals out of the maneuver then it wasn't stalled at the beginning, and you just did a fast roll. The aileron assistance is easily checked, try doing a spin with a Taurus without aileron, it simply falls out of the stall in a slow rudder turn. As you suspect, the main reason for the different response, model to full size, is mostly due to the really low wing loadings we fly, and the large size of the bits of air we fly in.
Evan.