I was discussing the relative merits of the various CDC feathers with a tyer the other day and he claimed that he doesn't use oiler puffs because they don't float as well as the other types of CDC. I tend to use them most of the time so I really don't have a good basis for comparison. I'm talking about using them for dry fly patterns as well as emergers. Is it a fact that oiler puffs don't float as well or is that just one man's opinion??