Dick, I still think you don't quite have the right answer.
The 727/737/757/767 all have fully powered flight control systems with trimmable tails (stabilisers). As the tail is moved to trim out any load on the elevators so the elevator neutral position is moved such that in a trimmed condition there is no aerodynamic load (aerodynamic moment about the elevator hinge point), this done by the neutral shift system. However, this aerodynamic neutral is NOT a mechanical neutral (see my previous post for figures a la B737)
Just because an a/c has a fully powered control surface does not mean that the designer will not engineer the system to remove any aerodynamic load on the system. A standing load on a flight control is not a desireable factor. It leads to un-necessary heating of hydraulic fluids (pressure required to maintain mechanical rather than aerodynamic equilibrium) and strain on pumps, stressing of mechanical load points, rod ends, bearings, etc. And finally, in the event of a loss of system pressure the attitude of the a/c would change (as the elevator took up the aerodynamic neutral from which it had been artificially displaced).
As an aside and to confuse the matter even more. Several fully autoland compatible a/c, during the final stages of approach deliberately trim the stabiliser to an a/c nose up position and offset this with elevator deflection. This is to assist the pilots in the event that a go around is necessary. As far as the crew are concerned the a/c is in trim as it is behaving normally.