I'm sure Alan will be along on this question asap, but I think your "dummies" book is wrong. If I remember correctly, Alan mentioned years ago that the engineering done by the studios are intended for speakers like the Q's, not direct radiating.
I would have to go with SirQ on this one. Whoever wrote that in the book was rather closed minded or biased towards a singular concept.
Direct firing vs. a bipole/dipole/quad...provide different effects and the results or preferences will vary depending on each individual. I had the same questions many moons ago and sat down in the past with M22s and the Axiom QSx series to derive some of my impressions of the use of each in the surround capacity.
Have a read at the now ancient post and take it for what it is worth; another man's opinion.
M22s vs. QS8s as surrounds 
