Alyssa Rosenberg flags a new study [NYT] that gives strong evidence against Hitch's famous contention. Her explanation as to why the "men are funnier" myth persists:
Different people find different things funny, but larger industry trends mean that men are given a wider range of opportunities to be funny in different ways — I can’t really imagine a woman getting a chance to do a true equivalent of Louis C.K.’s routine about how ridiculous men look during sex and not encountering a wave of body criticism, or being treated like she’s pathetic rather than hilariously honest.
The Dish 