This looks nice, although the document on killerphp.com is probably easier for amateurs to understand. Anyway an intermediate skilled programmer needs to understand all the concepts in the tutorial you posted and apply them nicely in real php applications. Without OOP, a coder is at best a beginner/amateur.
So I heard that a new book called Pro PHP MVC would be released by Oct 31st, cant wait to grab one. This is perhaps a good way for intermediate skilled programmers aspiring to improve into advanced programmers.