That's interesting. Your first sentence is true for me also. Happily for WotC, though, and for my past 5 years of RPGing, the game books also worked for me.Worlds & Monsters originally sold me on 4E, it was so compelling. Yet, sadly, I didn't get that same feeling from the actual game books.
Of the core 3 I think the 4e DMG is the weakest. It has big slabs of largely pointless (or at least far too wordy) discussion around adventure and campaign design which could easily have had a lot of the stuff from W&M put in there instead. The DMG does a good job of talking about the "tactical" aspect of encounter building, but doesn't build on the framework that W&M laid for having regard to the "story" aspect. Which is a pity, I think.
Hopefully the D&Dnext DMG will do a better job of that.