Now, this is what I believe the relevant quote from your link (correct me if I am wrong):
"...Dacron as a radial cut sail is generally inefficient due to the inherent weaving issues. It is simply not possible to achieve a strong warp in a Dacron sail. We tried it in the 80's with a little success, but not enough to overcome the added labor..."
Maybe this was in fact the case, in the 80'ies. But the 80'ies were like 30 years ago, and this is what North Sails has to say, today:
"... (we make radial cut sails) made using North's NorDac Radian warp-oriented
woven polyester sail fabrics..."
This is what Doyle has to say now:
"... Doyle's QuickSilver made from Woven Warp oriented Polyester addresses the problems performance cruising sailors have had to live with.
LAMINATION = low durability, high replacement expense, mildew problems, and loss of sail shape.
Doyle's QuickSilver offers the low stretch of laminates with the durability of Dacron wovens. Finally, this is a performance fabric
, that is not a copy of fabrics designed for race
boats, but conceived specifically for high performance sailing where durability is valued. Additionally, because it is a woven fabric
without any glue, mildew is not a problem.
Doyle's QuickSilver comes with a Three Year Guarantee. ...
And a word from Qantum, A.D. 2011:
"... This is the bottom line. Warp and off-threadline (Bias) stretch is often sacrificed in less expensive
woven polyester. This is the stretch that makes sails get too full (even when new), and which causes rapid deterioration in shape over time. It is particularly critical in cross cut sails because the panel layout can’t help keep loads on threadline
As for your opinion that "...the large brand names are marketing
juggernauts..." I can only say that from my close and personal contact with one of the brand names I took a completely opposite impression: plenty of professionalism, plenty of hard work, newest technology, and always trying to deliver the best sail to the client.
Experiences differ. Opinions result i.a. from experiences.