Question on steam attitude gauges

[Aviator168]

Does anyone know if these gauges are acceleration compensated? The reading might be off depending on acceleration.

[CESSNADON]

The display mechanism which is actuated by the gyro is well balanced so the acceleration forces should cancel out. There is not a step in the calibration procedure to accomidate acceleration or deacceleration. If the AI is properly calibrated it should not respond to forces other than attitude changes.

[Aviator168]

Isn't recognizing false pitch change due to acceleration/deceleration part of IFR training?

http://www.geocities.com/cfidarren/iplesson1.htm

(3) Hold altitude during power changes - show that the bar moves down on acceleration and moves up on deceleration.

I am sure those electronic ones can compensate this false attitude change, but what about the vacuum ones?