Watching some videos from the worlds, I noticed that kevlar genoas are now legit… for those interested, North have got a couple of very well prepared pages with some more info.
http://www.onedesign.com/class/j24/j24-article-kevlar-genoa-QA.html
http://www.onedesign.com/class/j24/j24-article-kevlar-genoa.html
In the end, the paneled Kevlar Genoa was very strong in moderate-heavy air and about even in the lighter breeze. The 3DL Kevlar genoas were great when they were going but sailed to a narrow groove. They seemed to react well to a tighter halyard and less sheet activity than the older generation Pentex sails.
In conclusion, we are happy with what we have done so far and where we have the ability to go. When the rule changes we’ll be ready. We are at a point in our R & D where the Pentex Genoa is hardly obsolete but the new innovations are beginning to look quite promising. The class is at an interesting and exciting crossroads and North Sails One Design is trying hard to help get you through it.