your points are valid GADRIVR and my points may not be as im only a student and have stuck with one instructor, but I believe that your post is incorrect. everything I have encountered in the air had already been explained previously. I feel very comfortable with the briefings but some are longer than others.
If I had to sit through an hour long briefing every lesson I can tell you right now that I wouldnt be able to do it.
now these are only my points so im not interested in a pissing match with REAL pilots but I like my training just the way it is and im very impressed with it.