I use the wing-down technique, and have since starting to fly the C130 many years ago. I now fly the 747 and, believe me, it works just as well on this. The main advantage is the stability of the approach, and that you have become accustomed to the adjustment technique before it becomes critical. That's why the kick-off method is more likely to result in you departing the runway if you flare high. Sure, there are disadvantages - one being the greater liklihood of a pod strike when landing in gusty conditions. At the end of the day, it's what you feel most comfortable with. As a final point, it's probably true to say that the lower the Vref, the less suitable the wing down technique becomes - I have visions of a C152 with 30 degree bank to hold a 20kt crosswind!