I'm not sure the authors understands what the NIH syndrome (http://en.wikipedia.org/wiki/Not_invented_here) is about. It is about writing everything yourself. IMHO the following paragraphe is highly symptomatic for that:

    A great mass of libraries, modules, code, and other 
    software products, available on the net are either 
    crappy in their own right, or simply not suitable to our 
    project. Forcing things to work together can be costlier 
    than simply writing the required code on our own.

In the context of software development, NIH syndrome doesn't mean that you use libraries not invented here but that you re-implement everything on your own.