I was actually kind of surprised that it was as "conservative" as it was. From my mother-in-law who lived through it, it certainly seemed far worse then that by 1970, but perhaps that is specific to certain regions or parishes in the US that were more experimentally inclined then others (i.e. depending on the parish what they could get away with - I'm sure that one could get away with more in San Fran then San Antone at the time).