I agree... I was speaking more of in sails in general (since most are dacron) just to give Pat a hard time.
Interesting concept on wetting the spinnaker... I would think in light air having a dryer spinnaker would be more important and in heavy air it would stretch out on it's own pretty fast, I guess the wetting definitely would induce that.
This is much less the case with mains and jibs... they take one race where you max out the Cunningham then there good. Spinnakers on the other hand, just get better over the first two regattas as they stretch in. In fact, if we have a new spinnaker at the start of a major regatta we'll get it full wet and then do a practice down wind just to stretch it in a little quicker.