her
If you can't check your sexist assumptions, then you could check the byline.
Here's an article about the forgotten tradition of they as a singular pronoun: http://news.ycombinator.com/item?id=723184
Also, because of the he, I assumed Ixiaus was referring to Gary Shteyngart, the author being reviewed.
This may be controversial or offensive, but it's the truth so I'll take the heat for saying it:
None of the most successful women I know really care or complain about things like he/she in the English language. For the most successful women I know - I'm thinking of an investment banker, lawyer, and chief editor of a magazine in particular - the idea of causing a fuss over pronouns is so low on their radar that it wouldn't happen.
Again, I'll take heat for this, and so be it - but I think people who complain about that sort of thing need to go do more relevant stuff in the real world. Most people who are actually hard working, enterprising, expansive and successful (professionally or in other worthy endeavors) simply don't have time to be upset and pedantic over this sort of thing.
Anyway, I'll take the heat for this now. It's not 100% the case, but the general pattern certainly holds.
I guess I shouldn't debate... I read the line about "... the hilarious moment 3 seconds into an intimate embrace when I realize that I'm literally rubbing the screen of my iPhone against his spine," and assumed the author was female because in my head, the "default" participants in an intimate embrace are a guy & a girl, since that's the one I'm most familiar with. So, negative points for me on the knee-jerk gender assumption front.
I thought that was a really great line, potential elicited sexism notwithstanding, by the way. I've had those moments myself. It took me a second to realize exactly what she was talking about, but once I did, I couldn't help but chortle at how much I've chided myself for the very same thing.
I note that nothing in this piece discusses Shteyngart leaving college (where the college link was how I resolved the pronoun in your first paragraph), and that surely Shteyngart will not write a follow-up to "this piece", (which is how I resolved the pronoun reference in your last paragraph). I guess I just don't understand how the male pronouns in your comment refer to Shteyngart.