So far - the stats have been mostly conversations and a few minor things (which I have pointed out in the WT) I will update it when like you miss major things if your stats get too high. I have been watching that, and reporting on it.
Right now - the only major things from the stats are if your love stats between Naomi & Carol .. if Naomi is higher - you have a couple scenes with her vs having them with Carol (sleep in bed together, walk around the schools, etc.) It hasn't been anything that is like "extra sexy time" scene. Yet, I am betting this is where the Dev is going (no proof - just my opinion) as there will be some point that things you have to have a minimum stats to do things.
The Nerve stats for the two main girls so far, mostly have been like alternate dialog type things. Like if Nerve is < 4 girl will say "Ill go first, that doesn't bother me" and if Nerve > 4 "I am too afraid to go in first, will you go first" Nothing that changes the game - just a little different gameplay.
The Alice dynamic changes things and we shall see how the conflict score plays out.