In over forty years of working with bikes I've yet to find an LBS that adjusts hub cones as part of new bike preparation and I know that given the time pressure I certainly didn't.

I thought it was a given that all new Shimano hubs come with their cones overtightened and every mechanic I know of regularly backs off the cones to acquire smooth running and accommodate the added pressure of the QR.

I'm damned if I know how there could be any argument about this.