
Pigeons
Any good training course or read-through of the books by someone with any experience (this is aimed at managers after all) would know that ITIL processes are not job titles. This is just merely a set of Best Practices for the ways that IT provides services and a set of terminology so that people from different backgrounds yet familiar with ITIL can communicate better. The other 85% is all commonsense.
I think ITIL certification makes reasonable to good IT professionals better and the crap ones worse.