Needless to say, many factors are involved in setting fastener torque specifications. It's been my experience that most bike fasteners I find are over-tightened. Perhaps due to liability or relatively unskilled hands during assembly. Conversely, it is a pleasure to disassemble a bike whose fasteners have not been overtightened. I wince when I think of exotic alloys, beautiful designs and tight tolerances to achieve weight-savings of a few grams being "torqued" during assembly.
Jack Romans
Sacramento, CA