Mostly interesting, though some of his assertions are somewhat questionable. Like saying that Perl5 takes its OO style from Python. I'd like to see some citations on that, as I don't find them at all similar (beyond both being object systems in a dynamic language). The JavaScript module pattern (which obviously came later) feels more like Perl 5 objects to me. Likewise for some Lisp and Scheme object systems that make use of innate closure support to build the object system from primitives rather than building it in--Perl objects are effectively hashes with almost no new core language features (bless, and the new special variable @ISA, primarily).