Take 10 families living on one block living in tract homes. Compare their electric bills. Are they all uniform? Are they even close to being uniform? Of course not because each family has a unique style of living. So trying to convince the Smith's that the Brown's kWh are "likely" is rather an eyebow raiser wouldn't you think? I live on 75 kWh per month. The chance that somone else would have a similar utility bill is more than unlikely. Economizing on power saves x percentage. After that it really impacts their chosen lifestyle. Good luck with that.