The name of the book is misleading. Scott's ideas are targeted not only at agile processes but cover the whole spectrum from agile to heavyweight/prescriptive, gearing them all toward agile.
I was exposed to a few model types I didn't know and didn't care to learn because my fancy tools didn't support them. Agile Modeling - low-tech alternatives in particular - gives me tremendous freedom for my modeling efforts from now on.
Scott's pragmatic and comprehensive style is wordy but leaves no space for BS.
Expect people defending their niche in heavy document-centric processes to be very upset by this book.