http://forums.startrekonline.com/sho...d.php?t=101249
This thread has a lot of detail about power settings - when you get to the tables, you'll see what little effect the Efficient Trait (versus the efficient engines) has. I beilieve Kiala just had ONE BO with Efficient for this test.

On a thread I can't find about the Efficient trait being broken, it turns out that Efficient acts like a +5 to the Efficiency skills, not directly affecting power settings by +5. Since Level ONE of those skills is +10 and level 9 adds +4 to the top (+52), you essentially get level 0.5 (Equivalent of level 10 when you skill them all the way up) in those skills for free - which amounts to near nothing, especially for any power setting above 50.