Via Language Log:
Overall, the women produced an average of 16,215 words per day, the men 15,669. Although a naive interpretation is that this shows that women are more talkative, the variance is large, so the difference of 546 words, only 7%, is not statistically significant. Indeed, although I don’t think that anything can be made of the fact statistically, inspection of their data reveals that the handful of really extreme magpies, who produced over 40,000 words per day, were all male.
Update: Die Zeit asks if relationship guides now have to be revised or if we can throw them all into the garbage can.