“It gets a bit more complicated when people claim that a DT can pick up easier, can carry more line, can mend better, and the favorite, can roll cast better than a WF line. All of these claims assume that you are fishing distances beyond the rear taper of the WF line. If you are fishing distances less than the length of the Front Taper+Belly of the line, you are virtually fishing the exact same line.”
hard to disagree with most everything there. there does seem to be however a WF biased opinion not only in this article but how it’s reflected by the pretty lacking selection of DT’s on their catalogue. not having a search bar the site isn’t the easiest to navigate and as far as i can tell there’s only one very generically named line in the DT format: Floating
personally, as a general line for trout-type species in rivers and streams i find the DTs hard to beat because i’m often fishing behind the head length, specially if it’s a short head and i’m adding enough line length to perform curves, mends and drag-controlling slack.
being limited in how i fish by the line’s head length is about as obnoxious as it gets.
having the majority of the line’s weight at the rod tip for all the roll and spey casts i find absolutely necessary in river fishing makes them easy, smooth and pretty and easies, smooths and pretties are there for aerial casts too.
ok, with DTs we generally don’t shoot much line if any at all and for most people that’s a very good thing as far as fly presentation goes.
shooting line and being delicate and precise while controlling the running line with WFs is of course possible but demands more casting practice work than most anglers are prepared to put some effort in…
DTs aren’t the end-all solution to everything, nothing is. they are however a very viable option a lot of anglers might be happy to re-discover.
it’s a shame that fashion over reason has made them almost obsolete but some companies like the Barrio Mallard Double Taper Floating Fly Line and Rio and the S.A. line mentioned above give us a choice.
another non-negligable aspect is the average price of a DT compared to WFs. as an example, the Barrio Mallard is £19 each including free worldwide shipping.
who can beat that ?