I am one of those who have really hard time talking generalities. Mainly because lacking a frame of reference usually cause me to try to spin in all directions at once, and Depends is a really bad way to formulate an argument. More often than not, a concrete example, hopefully backed with a code sample that can be dissected, is much more valuable, simply because it focuses the discussion on the subject at hand, instead of scattering it over all the possibility matrix.
The other problem with just talking is that words are cheap, and it is fairly easy to speak in such general terms that the conversation will be meaningless. I got burned really bad on the real world with overly general discussions, and now I mostly tend to drive people crazy by asking more and more questions with regard to the implementation details.
Strangely enough, I don't have the issue of going from a mess of details to an overall view of how things are combined.