The unfortunate reality of Madden is that the sliders don't affect much of anything. They will reflect gameplay sometimes, but the CPU adjusts the sliders in game to achieve a desired result (such as elite QBs having big number days, popular teams getting the win, ect.)
So, you can set the sliders to whatever you want, but they will constantly change when you start playing a game.
I don't think that's true at all. Teams and players have different ratings so games are going to play out differently with sliders. However some sliders are not as effective as others.
__________________ "Everyone wants realism until they get it" -bkrich83