Thanks, all, for comments.
I thought some more about this last night, and came to the same conclusion as Gary Buss. "Waiting on the Lord" coming out of a witness's mouth means they have been artificially halted by their doctrine or elders from doing the best they know they should do; what God is prompting them to do. Somehow, they feel that they are martyrs for not doing what is obviously the right thing to do!
(I remember reading advice from an ex-Mormon who said that their "elders" went into a sort of near-trance when giving their testimony. This was what they retreated to when they knew they were licked; it hypnotized them a bit and protected them from really listening to the reality you were presenting. He recommended butting right in and saying, "But where's the EVIDENCE that I can see?" every time they started. ...I think it has helped for them, and I felt that it was a similar situation with this "wait on the Lord" BS.)
If Christians "wait on the Lord", it means they have done everything that they KNOW they should do first, and have exhausted all the ways to influence a matter for good.
Loved your examples, Gary. Memorized now for future use!
bebu