Y Combinator News
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Or maybe the author could just recognise that a brand's name doesn't often change.
In fact, it used to be called 'Startup News'!
Therefore there are two brands (in my humble opinion).
It's true that the word "hacker" has morphed and become diluted, but that's what happens when subcultures go mainstream, and words are always changing anyhow. I don't like it either, but it happens.
http://www.paulgraham.com/swan.html
Anyway, if I had to wager a guess, I'd go with the Occam's-razor explanation that YC uses the word hacker because its founders identify as hackers in the original sense of the word. In fact, that hackers are better at starting breakout companies practically seems to be YC's thesis.