Well, I'll attempt my best @ diplomatically playing both sides. At first glance, from a logical engineering perspective, ford dropped the ball on the V6 shaft. A hollow shaft with the CV essentially in the middle, is going to get out of wack @ some RPM. Now what that RPM is and whether it is the owner's fault for exceeding the limitations is somewhat debatable, that's all I have to offer. I WILL be uprgrading my DS in the near future just for peace of mind. Is Ford expected to do anything really though? Why would they recall/change it? A large portion of V6 drivers report the apprehension of exceeding 115 , or tracking their car on a stock DS...please? AFAIK the stock DS is sufficient unless the you exceed the 115-120 mark......then an aftermarket option is on you.
Since you asked, I've hit over 115 plenty of times in my vehicle. No vibrations, no breakage. *Knocks on wood.*