Networking is really important in my field, and I never get to do any. DH does and it makes a huge difference. For example, he's always getting invited to do stuff by people in his network. So then his university are delighted that he's been invited to talk at X, to write something, to chair a session at C, etc. I get to stay at home while he does this, which means that he further builds his networks and mine dwindle further.
It also helps with peer review. DH's papers always seem to go out to review to his own (very much 'old boys') network and they never reject each others' work. They always ask for revisions, but it comes back 'accept with...'. He then gets the other 'old boys' work to review and it further reinforces the whole system. My work goes out to strangers and has a much tougher time in review (because the people reviewing it don't think 'oh, well X will get my next paper, so I don't want to be an arse'), despite there being no difference in quality.
Recently I've noticed that there are quite a few men in the discipline who've been promoted ridiculously fast. Professor by 34 type situations. It is only men though, all the women who finished their PhDs at the same time seem to have left academia, are still in fixed-term limbo or the lucky ones are junior lecturers. Again, it doesn't seem to be based on the relative quality of their work (although the men are generally more prolific, but in the 12 papers saying more or less the same thing kind of way).
To be honest, maternity leave, an extremely difficult breastfed baby who wouldn't take milk in any other form, even at nursery when I went back to work (or tried to), some health issues and an utterly ridiculous workload have pretty much done for my career. Whereas DH's career is going from strength to strength (and the bugger moans about a workload that is less than half what i have and full of phantom tasks that are assigned loads of hours to give him extra research time). He doesn't work harder than me, and his research isn't 'better'; he just gets some time to do it and his ever growing networks help everything along.
DH's attitude is also a problem though (but he thinks he's brilliant). He had a lot help from me during his PhD and trying to get a job afterwards, without which he'd have got nowhere (I had to teach him how to write because his thesis and papers were genuinely incomprehensible, and had to heavily edit all his early papers). In contrast, he's had a quick glance through one draft of a paper I've written and nothing more. He's always 'busy'. And his work always comes first. The big problem is that as our career trajectories diverge it becomes increasingly difficult to fight against his career becoming the main focus and mine the sideshow.