I'm not so quick to believe it happened so shortly afterwards (the relationship) when there's some evidence to suggest that might not be true.
Either way though, it's not a review. This is the problem: the entire thing was based on a false premise.
Also, I think you may be looking at it with a little bias.
I'm not sure what qualifies as bias in this context. Most of what I've read about gamergaters paints them in a rather poor light. So these days I'm biased against them, but I don't think it's unreasonable to judge people based on their behaviour.
Is there an real problem with their being so few females in coding?
It depends. If there's simply something fundemental about women which makes them on average less likely to prefer coding on average and the differences in numbers are simply a reflection of that, then no, there's no problem.
If there's other causes which are pushing out people who would otherwise like and be good at programming then yes, I think that is a problem, just as much as it's a problem that there's huge pressure for men to not be infants and junior school teachers these days.
I seldom see them asked and answered by rational people with data
Surely you want them answered by people with data :)
But yes, data is good. We have of course piles of anecdotes and things we may have personally observed (I've seen some conferences where women have been subjected to some rather shoddy behaviour and other ones where there has been nothing wrong at all---curiously IME the quality of behaviour correlates strongly with the quality of conference). I have many more anecdotes of course.
But as to hard data, it's difficult to get. That said people have tried a few controlled trials with various things, such as submitting CVs to jobs and have in some cases found bias.
There's also some interesting effects:
essentially given a group with some bigoted members equally distributed then a minority sub-group will be disporportionately on the receiving end of bigorty. This means that in essentially any industry where there's s significant gender imbalance, the minority will be on the receiving end of quite a lot of shoddy behaviour.
The result is that even if the gender imbalance is perfectly natural, then one still needs to put in effort to make sure the minority is not mistreated.
Truth be told, I have neither a nickel invested nor a care in the world.
Well that's fine. At the moment I'm not in a position where I can have any real effect, or be affected by it (employees? Ha! I need revenue first). I have been in the past. I suppose when I see bad behaviour going on around me, with people I can influence, I can either try to influence it, or I can accept it.
I've become less and less comfortable passively accepting such things as time has gone on. There's lots of nice quotes and platitudes I could wheel out along those lines, but ultimately it's a personal choice based on feelings, or if you prefer axioms. After all, logic does cannot underlie everything: it has to have an axiomatic foundation on which it rests.