I recall that if the AP is ON and speed brake in use then the AP uses more than 1.1 G, 1.15 I think. Just as the best button in the aircraft, the EXP PB, allows the AP to use more G. Some anorak can look it up.
One must have a raw data flying proficiency due to the reasons Gnads provides. Unfortunately if you do not have these skills when you join an airline I doubt that you going to develop them to a high degree whilst airline flying.