I don't know the process WC uses but by reading their site i assume they stretch the material before making the string. They claim it will then not stretch. Any string maker can make one and then stretch the completed string (there was a post of how someone did this a long time ago). Is prestretching the naterial better then stretching the completed string? I don't know. Just know that I make mine with tension on them and after putting it on I set the peep and don't worry again about stretching or peep rotation (after getting the fine tuning down). So to me it isn't a factor to prestretch the material (again I'm not saying there isn't any benefits only that I don't do it). Will it add speed? I wouldn't think so, just eliminate any more settling in the string may do, though I would think it would settle some.
Muzzyman88, what don't you like about the string? Just curious as I've been following your posts on it. If you'd rather e-mail me then that's fine.