PHP 5.5 may be great but a lot of people in the real world still don't use namespaces and other things introduced in 5.3.

That is why people are always calling out PHP because most of the language and most of its developers appear to be in suspended animation.

Developers who use modern tools like Composer, Behat, frameworks other than Codeigniter etc. just aren't that many unfortunately. They're definitely not the majority, like they are over in the Ruby/Python camp.