Not so noticeable that it has changed my mind. I still give my relievers normal pitch counts based on their IP/G. My thinking is just that they are more likely to have the platoon advantage for at least the initial batter they come in to face, which over a long period of time will hopefully lead to better results. Even if the gain is only marginal, sometimes those can make a difference.
For example, I just had a $120M team finish its season. LHP/LHS Felipe Rivero appeared in 81 games with a 15/15 pitch count setting. He completed 76.1 IP. He faced just one batter in only 15 of those games. In 11 of those 15 games, he either recorded the last defensive out and wasn't needed for any additional batters, or was pinch-hit for before he could face another batter. Small sample size, but at least in this case, Rivero was legitimately pulled after facing only one batter a total of 4 times out of 81.