I agree with TnP. The average time tuned should be quicker than untuned.
However, there are some draw backs in our trucks. The Ram torque converter is not very efficient at putting power to the ground when unlocked. I have never seen the actual specs, but I have heard that its is about 70% on a good day which is not a great number. That is a lot of wasted horsepower. Once locked, it will pull like a train.
2014 Ram 2500 6.7L CTD
2016 BMW 2.0L diesel (work and back car)
2023 Jeep Wrangler Rubicon 3.0L Ecodiesel
Highland Ridge Silverstar 378RBS