"Dave. In a Wave as the lady does the heel lead prior to doing the man's Feather. Can you see a movement away from the verticle by the man on that step."
You may not be able to see the start of the swing as clearly in the man when he is going backwards, but if the lady is going to develop a feather swing, in particular if she is going to get her heel off the ground as or before the other foot passes (as a feather requires) the man is going to have to do something in his body that suggests it.
A question was asked about poise and residual sway between steps two and three. Remember that as a passing step the feather does not use the pendular rise - to - stall of the waltz. Instead the swing converts to a metronomic or overhanded motion. As a result, the body will be more vertical with respect to the floor, and the path flatter, at the highest point of the rise. Many "advanced intermediate" dancers carry a huge amount of man forward poise through the reverse waves, with the lady shaped quite far back - at first it looks impressive, but when you see how far behind her feet she is, you realize it's not good, coordinated dancing, but just blissful ignorance.