Well, it's not a truck, but when GM replaced the driveshaft of my dad's 1994 Camaro Z28 (recall; most of the 6-speed cars, his included, shipped with unbalanced driveshafts) they used the 1LE aluminum driveshaft as a standard replacement. Not a single problem with the driveshaft since, and I know it made doing the clutch recently at least that much easier, heh. It's a good 7 years old and it looks perfectly fine to me, no problems with rock chips or anything.
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Project 1970 - soon to be seen at
http://milhouse.treylis.org:81/