It is indeed marked, at the top: "This is a first look at a working design for the Perl 6 type system. It has not been accepted or endorsed by anyone, but is being shown for first impressions and feedback.
" The status will evolve through subsequent drafts. I wanted a wider discussion than just the perl6-language group since everything there is quiet agreement "you work on your area" and not much discussion. The ideas of higher-order polymorphism have not been explained to outsiders, just kind of assumed as part of the requirements.
Maybe you should start with the first page, so you won't be so surprised when you get to the last? Or do I need to put cute icons next to important paragraphs like with mass-market computer books? Maybe I'll change the font or the color.