No rescue can be considered successful until the skirt is reattached, the excess water pumped out, and the boat is underway again. One thing I like about nylon is that it gives you the option of leaving the skirt on the boat should you have to wet-exit. Many a reenter-and-roll or other self-rescue has failed when the paddler couldn't reattach the skirt because conditions were too cold or rough.

I've never had a nylon skirt "pop off", even when trashed in surf, but that might be because I have a small "Ocean" cockpit on my '84 Nordkapp. Then again, having watched that wild Tsunami Ranger compilation video on YouTube, maybe the surf I encountered wasn't quite as gigantic or rough as I thought it was at the time....