I strongly suggest to all those that think that Stroebel has said someting else than he said to take his book and to learn about the flash synchronization from him. View camera technique, Leslie Stroebel, 5th. edition, Focal Press, p.68-72. Without reading it you can make teories about what he said or didn't say but they are totaly useless for those who read what is said and what isn't said. A lot of diagrams about the different delays and synchro problems are there too...