While I agree with Frisky and Jillio, I have noticed that some deaf families do a lot of something that looks like PSE(I feel it's more an advanced and fast paced mix of different languages than PSE). It can be that the parents was raised in an oral school or are too old to be a part of the empowerment movements in the seventies, or have family members that are hard of hearing, too.
PSE style or not, those families are often pretty fluent in ASL, too. Their multilingual skills, and capacity to switch beetween full on languages often impress me.
