I don't know where this author comes from, but obviously not the Northeast or West coasts of the US where "guys" has been used to refer to mixed gender groups f

I don't know where this author comes from, but obviously not the Northeast or West coasts of the US where "guys" has been used to refer to mixed gender groups for decades. It's no different that "y'all" which is more popular in other parts of the country. Words and phrases change meaning all the time. The essay fails to understand such a simple concept and is just plain stupid because of it.