Wow, I had no idea a single comment on overtightened everything would lead to this discussion. In retrospect, it's probably a best practice vs. common practice issue.
I've always wondered why hubs came tight from certain manufacturers. Perhaps the manufacturers assume that since a bike will be set up properly by a shop, it should be properly torqued at some point before it lands in the hands of a customer. So final setup is left to the shop and not the manufacturer.
But the other thing that entered my mind is this: A hub with a lot of play is impossible to true. A hub that's on the tight side will run true more than a hub that is a little loose. And a hub that's loose is actually fairly easy for a non-mechanic to spot; just grab a handful of wheel and move it laterally, see if there's any play.
So if the shop doesn't address the tight hub torque, less chance of being spotted by the end user, and less chance of being a true reflection on the manufacturer.