maybe, from electrical FC and torque point of view it improves, but unnoticable with dyno butt. try on a 'reliable' dyno machine.
"theoritically it helps to reduce the noise interference on your power supply/sensor's signal line thus improve the accuracy of your ECU calculation and optimise its performance" - sensors can detect better, would it to be better? so i also agree here.
i dont know, because i believe there is improvement, but unnoticable on my butt i think..