Most of the stuff is VERY relevant.
The times when it isn't, you can basically just skip that portion; e.g. all the 24p, 24pn, 24ap, 24pa, 29.98fps, and other NTSC crap!
And the good thing is that Barry is very conscious of us PAL People, and constantly makes reference to the PAL specs, such as 25P instead of 24P etc, throughout the book. Plus there's a whole bunch of info which is great no matter what format country you live in.
I have a shoot coming up where I'll be popping the DVX's cherry - I can't help but feel that it's all there to be figured out by oneself and the instruction manual (which isn't bad by user manual standards). Besides, I'm broke...
...Ah what the hell, I've changed my mind - I'll probably end up getting it - I'm too weak to resist the ton of advertising for it on this website anyway!