Bill,
I cannot make any comment on your post because I have never used one of Blue Sky's furled leaders. I really do love the color of their leader. I do not feel the color has any effect on the purpose of it, I just love the mint green color! I have looked everywhere for that particular color and cannot find it. I do question what they are using for a material because their package states mono but on their web site it states they are made from nylon. I know that nylon will sink slower than mono and flurorcarbon will sink faster than mono. Knowing that, I like using fluorocarbon for the furled leaders I make for my style of fishing. I want my furled leaders to sink quickly and I have used mine on a full sinking fly line and they work just fine and I feel the Blue Sky furled leaders will work fine too. Some do not like using furled leaders made from either mono or flurorcarbon for dry fly fishing due to the furled leader sinking and pulling the dry under. With 5 foot or more of tippet attached, I feel that by the time the sinking furled leader starts to affect the dry fly, you will be to the point of your drift where you will be recasting the fly anyway. To each their own. Just my opinions and I wish I could answer your question. I agree with ducksterman, in that they can be used in about any fishing situation you are using them for.
Warren
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.