well...you may have read an article, but I've been using one of our Nova jackets filled with DuPont water resistant 750fp down for a while now. I think it's pretty good at delivering on properly managed expectations. Even after immersing a jacket fully in water the loft returned to maybe 75% of full function virtually immediately. Perhaps your read on hydrophobic down (not hydrophilic down wayno, water loving down would indeed be a silly gimmick

)is very differently to mine- I sure don't see it as a rain coat, but I do see it as a potential life saver in an incident..imagine in a remote wilderness location and somehow your key (down)insualtion gear got wet- previously you assummed it was essentially useless while wet, with a long dry time- this can make survival, or at least sleep very unlikely. This technology allows a much better recovery from the worst case scenarios. Perhaps water will affect over time, but that's hardly the point...it's the greatly reducing the effect of water in unintentional contact where I view the positioning.
I'm pretty impressed so far...but I did find myself getting my jacket wet and going out in it in Japan wet in January "just to see" (it froze).