Universal's Express Pass ranges from $15/one park up to somewhere around $50/one park, depending on the time of year, if you're not a hotel guest. Plus, it's supposed to limit you on the number of rides you can go on--they'd scan the pass at the entrance to each ride, keeping you from being able to go on it again later on with that pass. However, we were there a couple weeks ago, and we only had ours actually scanned once the entire day.
Personally, we did prefer Disney's FP over Universal's. DH said it felt like he was getting nickled & dimed for everything over there (this isn't a setup for an argument between the two parks, btw--it was just DH's observation!). Both systems have their merits, but I personally don't like having to pay for it.
I don't know how Universal does their pass system with AP holders, so I can't comment on that. I know a lot of Disney AP'ers who wouldn't be happy if it were switched to a hotel only system, unless they were somehow included in it. But nonetheless, I've heard repeatedly that it's only a rumor & that the book was mistaken, so I'm not worried about it.