>75% of the web's server-side code is php. most of that is WordPress, but lots of people customize it, and being able to write your own themes, plugins, etc is a big deal
I submitted this HN link with a title that exactly matches the one on the article, but I didn't write the title on the article. AFAIK HN posts should match the title of the article they link to.
I appreciate your scruples though! Because even though you would have been on the right side of HN's rules to correct a misleading (and/or linkbait) title, the fact that you work for Google would have opened you to the usual gotcha attacks about conflict of interest. This way we avoided all of that, and it's still a good submission and thread!