As a counter to my own argument... http://www.mailchimp.com/blog/ewww-you-use-php/
Sure, there are language nerds and IRC-fueled rivalries, but when interviewing prospective employees it would seem they're choosing from the most myopic. If they are entry-level FOOC one-lang kids, it seems additionally strange that their attitudes would form the basis for a blog post with such sweeping characterizations.
It just seems like he's either putting way to much stock into the thoughts of unseasoned professionals, or for some reason they're interviewing lots of non-PHP people for PHP positions. I don't know, his argument and reception of language backlash in this context just seems a bit dated and I'm left wondering if it's just a matter of their posting poorly-written job ads.