Happy Jack,
I hope that this doesn't upset you...please don't bite.....I'm afraid that you've got it wrong. Dan Winterland is correct.
Both loading and power (or rather, propwash) affect the stick position at the stall. If it were not so, we'd just do as Langesweische suggests and fit 10 cents' worth of wire to the joystick, limiting its movement and making aircraft unstallable and very safe.