Hiring a CEO, you know (of) the person and its more likely a "the board wants to hire {that person}" and it really doesn't matter what the text of their resume says. At most there's a dozen candidates and a several month process for selecting one of them.

For developers, if the resumes are largely the same, then you're selecting for the ones that show evidence that they read the job posting and want to work there.

This isn't about hiring the best candidate - it's the least risky candidate that is hired. If you're listing the preferred language of the job and the language that is mentioned in the job posting last, you're more likely to be a risky candidate than one who lists it first. You may not know the language as well. You may not enjoy working on it (there's a reason I don't list php in the languages on my resume).

In a stack with less risky candidates, the one that has the preferred language last won't be at the top of the list for callbacks.