A 120-page manual about good writing practices - and that makes the reader a dull person?
I read through the beginning of the document and it looks good to me. It seems to be a well-written readable document which can be immediately useful for people writing company documentation (such as myself - occasionally I have to pause writing code all day).
I look at the IBM style guide and Microsoft style guide fairly frequently these days. I wonder what does that say about the state of the US economy, politics, and ideology? Exactly the same amount as the EUC Style Guide about the EU, I'd wager.