Twitter Study of the Sexes Raises Eyebrows

In a new study by Harvard University Business School, it's been noted that there is a social phenomenom inside Twitter that analysis clearly shows: Men don't tweet each other.
Oh, they follow each other and keep tabs apparently in silence, but the resounding sound coming from dude-to-dude communication is, instead of "Tweet tweet," "CRICKETS."
Seriously, an eye-opener for me was that Twitter is mostly male-dominated, which they say is in reverse to most other social networking sites (Could it be you must tweet within 140 characters?).
Other gems from the analysis:
Men have 15% more followers than women.
an average man is almost twice more likely to follow another man than a woman.
Among Twitter users, the median number of lifetime tweets per user is one.
the top 10% of prolific Twitter users accounted for over 90% of tweets.