Regardless of what torque value you use, a bolt can only be accurately torqued up a finite number of times before it starts to lose it's elasticity. The closer you get to it's maximum torque the lower the # of times it can be retorqued.
This doesn't mean that if you use 70ftlbs the bolt (stud) will last just that much longer because you have to remember that a minimum amount is required to hold tension. 80ftlbs is the minimum that will hold tension to keep the wheel properly tight. 90 is a more average amount, and 100 is approaching the max strength point for a 12mm stud. The stud will fail much faster if torquing to 100ftlbs.
This is not an issue if you install wheels 4-5 times over the life of the car, but if you find yourself changing wheels often (like at the track every weekend) then 100ftlbs is going to wear out the studs much quicker than you probably think.
Just as a casual reference, when you torque a 12mm bolt/stud, if you take the bolt to about 60ftlbs first and then step up to 90ftlbs you'll find that a good bolt will reach torque within about 90 deg of rotation. If you find you are having to turn a lot more than that on some of the studs to get 90ftlbs, then they are beyond elasticity and are entering failure. If you are ever tightening a bolt and it seems like it takes a long time to go from "tight" to "torque" then that should be a big huge red flag.