Also, men are better at nonverbal communication. If a friend has good news or bad news it's sufficient for me to say "Hey, congrats!" or "Bummer, that sucks dude", and we both know exactly where we stand. There's no need to spend several thousand words on agreeing with each other on exactly how good or bad the news is.
edit: Also, men and women find different things interesting. Women are far more interested in "feelings" and "relationships" as complicated objects worthy of discussion, whereas men see them as simple things unworthy of too much brainpower and would much rather think about "things" or "ideas". This explains why groups of men and groups of women will choose to talk about the things they find interesting, and why many man-woman conversations are doomed to be deathly boring to one partner or the other.
Few the women I know are "emotionally weak." They do tend to be less stoic than men, but that is very different from weak, and I suspect that is at least partially cultural. I do think men are more stoic about dealing with minor problems in life (in general), but that has to do with how they express it, not how well they actually deal with it.
I also tend to find that men, in general, are less wordy, especially about emotional topic, but I think that is less about men being better at nonverbal communication. In fact, I find in general, the women I know are stronger in that area. The difference is that women tend to spend a lot of words agreeing as a cultural means of bonding, where men don't. This doesn't mean they do it for communication, they do it for affirmation of the relationship.
I will agree that, in general, women are more interested in feelings and relationships then men, but not because these are simple things or unimportant, or even that most men see them that way. It is simply a difference of focus. For instance, I do not find medicine "a simple thing unworthy of too much brainpower", I rather find that it is outside my domain and I let doctors worry about that while I worry about normalization and effecient storage structures...
It would appear that the research on the subject is somewhat spotty and often gets misinterpreted, sometimes at the source.
I found a book on amazon the other day called Pink Brain, Blue Brain by neuroscientist Lise Elliot, which is next up on my reading list.
http://www.amazon.com/Pink-Brain-Blue-Differences-Troublesom...
One study I read about described a situation where the researchers bundled the same baby up and told some people that it was a boy and others that it was a girl. The people who thought it was a girl tended to comfort the baby when it got fussy, and the people who thought it was a boy tended to try to distract it.[1] Subtle, but I can imagine that there are other ways that we train girls to be more 'face to face'.
[1] from http://www.amazon.com/Failing-At-Fairness-Schools-Cheat/dp/0... --marred by some selection bias in the data they used, but very interesting nonetheless.