It's almost like TFA is about this very distinction. Whether or not you agree that "guys" should be used as such, it is in fact used as such in common english.

It's almost like TFA is about this very distinction. Whether or not you agree that "guys" should be used as such, it is in fact used as such in common english. "how many guys have you had sex with?" implies maleness, though it would also depend quite a lot on context. "what's up, guys?" is used in a gender-neutral way, therefore it is gender-neutral. That's an entirely descriptive, not prescriptive, observation. Language, especially slang-y words, are more learned than taught, and neutral-guy is no exception. We humans use "guy(s)" as male in some context and neutral/unspecified in other contexts. No one told us to do so. Whether we should consciously stop doing so is a judgement call. When someone actively makes that correction in conversation, that rubs some guys (including my bio-female partner) the wrong way. Now, I think it's noble to attempt to use gender-biased language (such as neutral-guy), and eventually it will hopefully fade from usage, but it's still obnoxious to make the correction by interrupting conversation.