Rolf,

Brion Toss is arguably one of the best riggers in the US. He has a pretty comprehensive website which includes a discussion list. Toss, as you can see from the article, thinks quite well of textile rigging. Have a look at the 'spartalk' discussions. The Cruising Forums also have a fair amount of discussion regarding textile rigging.

Dynex Dux is made by Hampidjan and they have data at the Hampidjan website http://www.hampidjan.com/

For my part, I believe what people describe as 'creep' is actually alignment of the textile fibres, which if the rigging is left up would be easier to account for than for instance in my case whereat I rig down after sailing.