After days of rain, snow, ridiculous wind, and not being home between sunrise and sunset, I finally got a chance to test some of my new parachutes from the other day.
All 4 chutes work well - they fold, unfold, and carry weight perfectly well even in below-freezing temperatures (when plastic chutes would be a solidified blob o' non-draggy-ness) and the well-placed nylon lines work well. In fact, when the 13" chute landed in a tree, the lines were thick and slidy enough that the wind later pushed it out. (A plastic chute with string lines would have tangled and ripped).
The streamers also worked fairly well, though I think nylon is a bit too thick for small streamers.