Looks like the last time I tried out Perl 6 was almost 10 years ago. Even wrote a few blog posts about it before giving up on it again. Might be time to take another look.
The reference to "Programming Perl" was no doubt helped along by Perl developer Jesse Sheidlower who worked at the OED in the early 2000s. From his Wikipedia page: "Although not a computer programmer by training, Sheidlower introduced Perl to the North American offices of Oxford University Press and developed tools for data manipulation when no programmers were available. He is also one of the core developers of Catalyst, a popular Perl web development framework."
To me, it means features which would not be obvious to me in their function coming from a PHP/C/VB/Java background.
I typically write code which I can (and do) copy and paste into PHP almost without changes. (I use PHP as both webserver glue and for duplicating functionality so that I can have two copies of the same code to validate against each other.)
I've also started adding some Python to my project and developed a very similar style in Python, using commented curly braces to reduce the code's brittleness.