^That's all true, but it's not as if two years is a great deal of time. Generally mass-media genre productions are 10-20 years behind whatever the current trends are in prose or comics. Or at least they blend elements from the past and present alike. Look at Batman: The Animated Series
, which distilled the best of Batman comics from the '70s through the '90s. It's natural that the developers of the '66 Batman
series would've also looked at the history of the comics as well as their immediate present, and tried to incorporate the most useful elements of both. And comedy was a large part of the source material they drew upon.