Firstly we are not talking about fish specifically we are talking about Coho.
Secondly it depends on the kind of water you are fishing not if you are fishing a sink tip.
Thirdly you can do the math and figure out the sinking rate of a type 6 vs a small shot on your line, I don't have time.
Lastly I don't fish fast water for coho and I also don't use shot on my line. How long have you been hooking Coho on a swung fly and do you get them on dries too?
Firstly I know we are talking about coho specifically at the mouth of the vedder.
Secondly I agree it all depends on the type of water condition.
Thirdly my point is that in your post you make it seem like all people who use a sink tip are flossing the fish. My point is that just because a sink tip is used it does not mean that we are flossing the fish.
To answer your question about how long I've been chucking flies for Coho...it's been about 12 years since I chucked my first fly for a coho. I've never gotten them on a dry fly, but I have on my dry line before.