Thanks, and good to know Terry has known Quick. I re read that post, and noticed the bold faced part suggesting the back should arch down (the middle lower than the ends), however I'm not sure how this is consistent with the underlined parts:
"Contrary to what the article, they said that the head should be slightly negative (tilted forward) and the body should not be completely straight. The idea that they stressed was pressing the chest into the water, and by doing this the upper body is supported while the hips are brough up making your legs lighter in the water. Milt Nelms is famous for his swimming illustrations, and his drawing up backstroke is more that of a slight curve that a straight line. So the chin should be tilted slightly forward, and the back slightly rounded."
"The back slightly rounded" seems to be just what Lochte looks like in the video.
Any comments welcome.