"foot passing action" is not necessarily an official term - I may very well have made it up, figuing it described what happens at the end of an open turn, on contrast to what one might call a "foot closure action".
In terms of the book definition of the reverse pivot action, I was trying to point out that it's defined as a half beat action, so presumably the offical technique applies there. In contrast, where a slip pivot (by name) applies you are often given two choices - one with a quick slip pivot, and one that moves the syncopation earlier to give more time for the slip pivot. So I guess what I'm saying is that I don't think there is a mapping between technique and timing as you describe, since the only evidence, while vague, actually points to an opposite relationship. I'm more likely to believe in a mapping between commencing foot position and pivot technique - open turns leading to more of a slip technique, with foot closure leading to a conventional reverse pivot.
But if you look at what Jonathan wrote, he suggests that the slip pivot is defined by something else entirely, the lady closing from fallaway. I have seen people teach different footwork for reverse pivots (push off toe) vs slip pivots (roll through heel) which applied across the various figures in the same way as Jonathan's definition (slip version only from fallaway, normal version from open and closed turns).
In terms of starting a thread, what do you want to talk about?
