Culture Shock happens when there aren't any psychological anchors for the subject to hold onto. A strong moral code/compass and an optimistic demeanor can act as a cushion to the modern slam-bang world. Plus, remember that "what's old is new again" recycling of culture happens all the time. The differences between 1960's tech like computers would be a hurdle, as well as the numerous solid state gadgets from cellphones to digital cameras. Of course there would be the occasional meltdown, as what happened at the grocery store in "Moscow On The Hudson" when "Vladimir Ivanov" found numerous kinds of coffee arrayed.