Hi Stephen,

The  Pro V1 and Pro V1x golf balls are designed for all swing speed players. When deciding on the best golf ball for you game, you should remember to take into consideration all shots that you will hit during the course of a round and focus on lowering your score. Through our extensive player testing and research we've seen that game changing differences are found on the scoring shots into and around the green, and the Pro V1 and Pro V1x offer the most performance control on all shots. Golfers of all skill levels and swing speeds play Pro V1 because of this real performance benefit.

We also had an opportunity to sit down with the R&D team a few weeks ago for a live webcast and they provided some great additional insight that you can watch here (the swing speed question comes up at 7:41 in the video). Hope this helps.

thanks for forwarding the video to me...very interesting!!