It seems a good amount of the damaged products we see on this site are from people using the pre-set torque wrenches. I'm guessing part of the problem is that most products have a "max torque" equal to that of the wrench setting which results in damage either as a result of slightly off wrench settings or user error.
+1....many (perhaps most) people do not realize that the MAX torque specification stamped on stems, seatpost clamps and other parts, is NOT the recommended torque spec. More importantly, I suspect that most people do not realize that the MAX torque spec has nothing to do do with torque needed to mate the parts being installed (e.g. torque needed for stem plate to hold handlebars), it is instead the MAX torque rating for the BOLT, not the part. The APPROPRIATE torque for installing/mating parts is simply the minimum amount of torque needed to affix the mated parts, without going over the MAX torque rating of the bolts. If you reach the MAX torque and the parts are still not securely fixed then its a no-go.
When I hear people using Ritchey and other pre-set wrenches to install carbon bars, ham-fistedly and carelessly torquing bolts up to the rated 5 Nm on the wrench, I cringe...a four bolt stem plate will seldom need more then 3.5 - 4 Nm per bolt to fix the handlebars securely.