Nope. The above isn’t always the case. I began a new campaign to experiment. I had one guy (Baldomar) with the impatient trait, and another (Walter) with the Adrenaline perk/skill. In battle, began in regular formation (probably c. 11:40am in the newer logs), the guy with the highest initiative (neither of those) was the first to act, and “impatient” Baldomar didn’t act till about 6th in the first round. At the end of the first round, I moved Walter into the midst of the melee and then used the Adrenaline skill so that he would act first in the next round. In the next round, however, Baldomar was indeed impatient and was first to act, and Walter was only second to act.