Are sturgeon line shy? I think so. Not in the normal sense in that they do not shy from the main line or by sight. I think they are so sensitive to touch that they shy away from stiff leaders that connect the hook to the main line. I have been using Tuffline for the past few years for leader material because it is so soft. I think sturgeon shy away from mono because it is so stiff particularly in the heavier sizes we use for such large (hopefully) fish.
What is your experience or have you tried different materials?