I'm in agreement with Paul; there has been a tome of discussion on this topic already published, and more than a year of submissions from numerous interested parties on Jeremy's thread. Experimentation of all materials and devices are performed by ALL of us, although some are more clever than others, and I personally have gleaned much of my education from other's research. In fact, I find that my Rose and Ataman attys work better with Lyocell, and the Erls and most drippers work better with loose Sally's type rayon. I've been sold on this stuff since the beginning.
Obviously, a whole bunch of vapers have decided that rayon is their go-to wick. And apparently some of them feel very passionately about it. For me, the jury is still out.