Pablo, you have no idea how bearings are adjusted.
Foe all interested here's how.
First bearings are NEVER torqued, you screw the bearing nut on BY HAND AND ONLY BY HAND, then you spin the wheel, drum, or hub, AND DO IT AGAIN BY HAND, then you do it a third time, Finally you put the serrated Tin lock cap on the nut and inert a cotter Pin to hold it exactly where you set it, NO TIGHTER OR LOOSER.
On Volkswagen's they have no stamped tin crown, instead they have the axle drilled twice, and the axle nut slotted six times, so you tighten as before then either insert the cotter Pin as straight as possible OR back the nut NO MORE THAN 1/16 TURN, and put the cotter pin in. NEVER TIGHTER, ONLY LOOSTEN
By stating "The nut was torqued to specifications" Sears is admitting the bearings were far too tight, and YES tight destroys the bearings shortly.(A couple of days to a week, the tighter they are, the shorter they last)
Obvious incompetence, and they were fool enough to say so. (We torqued the nut to specifications)