Yes, right after making it, those were the values listed in my skills tab. I had my Sim drink each one, and they all gave him Full of Life: 50 x 8 hrs, Commanding Complexity: 25 x 8 hrs, Warm Fuzzies: 15 x 5 hrs and Sugar Rush: 15 x 4 hrs. I mistakenly believed that was the max. When I was on another Sim and drank the same Plum nectar while visiting, it gave Commanding Complexity: 30 x 8 hrs. The other buffs stayed the same. I didn't have the 2nd Sim try the other nectars. Maybe my game is glitchy, I'm not sure. Can one Sim appreciate nectar more than another? I know I can have 2 Sims on the same bed, and one gets +30 while the other gets +60 from the comfortable furniture.