That is a weird distinction, probably is a cultural thing? How can be better to say one of the other?. I have more than 30 years with my twin brother. My aunt is a professional trainer for people with disabilitues (a sport, gold-winner kind of trainer), I have learn a bit of sign language and so on. But I never heard that kind of argument (ie: here in colombia none of both will sound more or less respectfull, are equivalent)