If you guys want to reminisce a bit, take a look at this older thread. It got sidetracked a bit onto nose down or up trim (without really discussing the big difference using it with a adjustable stab vs a trim tab), but it all relates to this thread. I like a later post from "spinner", talking about landings and take offs with a nose down _stablizer_, (cub trim), which he felt made a noticeable difference to him. I've heard similar stories from other guys that I try to learn from. Tail carries more of the load, thereby helping to unload the wing a touch.
http://www.supercub.org/forum/showthread.php?45153-A-little-help-with-landing-technique
I've not gotten consistent with it yet, but when done right, the feeling/impression/resultant roll out for me was always the best with a steep approach angle, nearly mushing it all the way down. The part needing practice of course was arresting the descent rate at exactly the right time to plant the tires without bouncing. Again best done in consistent wind or no wind. But with 29" Airstreaks, the rollout for me was always shorter than a more traditional flatter approach and relying on braking power. I had bungee's, but it seemed if you had 31's and shocks you could really bring it home short.
I see this as simply geometry. Steep approach angle provides the same flying speed, but with a more unloaded wing in a downward vector instead of a forward vector, therefore the forward groundspeed is less than a more traditional approach. The old adage about the visual perception of the approach being a "walking speed" starts to really hit home. Upon ground contact and without bouncing, roll out is very short.
Without the forward movement, it's just maintaining perfect control and arresting the descent without planting deep or bending parts up around the wings. I would't even attempt it in a Trike, or traditional metal airplanes. But in a rag/tube bush-type airframe it really is a noticeable difference to me.
pb