Based on my testing they do because I tried it with custom player sliders at 20 also. My theory is that the cpu sliders hinder the players in cpu vs cpu, with the cpu sliders at 0 and the player sliders maxed out basically the players play up to there full potential. Its evident in the stats I was getting. Just try them out exactly as I have them and see for yourself. Also the way I explained to do the controllers is also very important.