We likely didn't grow up in houses that didn't play the Beatles. In terms of music from that era, I grew up with the Temptations, Michael Jackson (Jackson 5), Billie Holiday and Diana Ross. I didn't grow up listening rock.
I'm not sure about PD but for me, it's not that I didn't know anything about them. I heard the occasional song. Everyone has heard Let it Be, Come Together, Yesterday, Hey Jude;etc. but I never listened to them seriously. My friend gave me a best of Beatles lp once and it was full of 2 minute long songs which didn't impress me very much, so I didn't bother listening to them.
However, the remasters are the perfect opportunity for someone who has never seriously listened to the Beatles to give them a fair try.