Nope. :) You could write a quick script to modify the
underlying XML files, but why bother when it only takes a few
seconds to modify them by hand with the Presenter interface?
However... you could make up a blank presentation with 20 -
30 slides to serve as a template. If you set the Presenter options
for your template, then use a copy of it for all subsequent
training, it will retain all the "default" settings you've made.
The same thing goes for using the "duplicate slide" command in
PowerPoint; if you duplicate a slide with "pause after animation"
set, the duplicate has the same setting.