I have been using 70kts ias for a speed on final(full flaps,gear down) for 40 years and it works great for landing in most instances.I read an article recently that an instructor not only recommends, but teaches 80 kts on final. I told him that I felt this is 10kts too fast and his reply was that 70 kts gives a high sink rate and gives little options close to the ground. I am not a CFI, but I feel from my experience that 70 is a much better speed than 80. What does the community recommend? Am I incorrect in my practice?