I actually have been flipping the blade every 3 shaves. This was the first time the blade showed me significantly different performance after the flip. I would do it daily, but I've had good results so far this month with a flip every 3 shaves. I'm wondering if it was more noticeable because I have gotten so many shaves on this blade and the edge is finally showing some significant signs of wearing.
Differences are more pronounced with a seasoned blade.