jofjonsboro. It is not what or why I do. It is what is being done. You have been looking, I think on youtube, but have not been paying attention, you are seeing only what you think you see and not what is. This is also the same in the Quickstep. You might be suprised to know that some of what you are looking at. Many dancers , if you count do all there Feather Steps by not using the fourth beat but use beat one as a preperation followed by three quicks. After a Change of Direction it is not uncommon for a dancer to dance four quicks into a Feather Step. Change of Direction becomes S on the LF. S on the Right Foot and step through LF on one beat leaving the other three beats for the Feather. Why do it this way. because the other way takes up too much time. Go to the O6 Final at the British and watch Crossly give a perfect demonstration. not from a Change of Direction though. It appears that he was forced into changing his routine slightly when he got blocked.
You might also count Timothy Howson at the very beginning who uses the fourth beat as an entry. We live and learn dont we. The lesson to be learnt is never take anything for granted.