The episodes are prefaced with an interesting disclaimer:
The early episodes are intended for grown ups and might not suit the needs of today's preschool children.What?? I am not alone in my reaction to the Sesame Street disclaimer (Blogosphere). Virginia Hefferman in the NY Times summarizes it sarcastically: it is "certainly not for softies born since 1998, when the chipper ‘Elmo’s World’ started.”
Perhaps the kids of today might be missing contemporary geography or ultimate fighting exercises.
My kids have been enjoying Old School Sesame Street. Similarly, my son loves the old Popeye episodes (YouTube). They are definitely a lot little less PC as the children's programs of today. But if anything the Popeye episodes teach one to take things with a spoon of salt.