average escape rate of survivors are suffering from same symptom as kill rate of the nurse.
It's pretty obvious most M1 killers can be easily looped by just palettes and windows, but since it takes too much skill for most players, average stats shows much lower than actual capability.
Comments
The problem is that whenever they release these stats they don't separate even moderate players and above from newer players which skews the data by a large degree making them kinda useless.