Good to see it wasn't just me. The interesting thing about the article is that you can skip to the very end without losing much information.I will have to finish reading that later. Right now, my brain is befuddled.. at first impression though, it seems you would have to be standing around like a vulture if you had more than one hen with her egg in the proper position to signal laying very soon. I have used this method when I wished to know if my hen was acting this way or that because of an egg. The only other thing I've done is accidentally scared a hen off the nest while checking for eggs and if there is a very warm egg left behind and no other hen lurking around the nest box, I pretty much assumed this egg was from the one that just took off.
Walt