Generally when I have wheel work done I try to remember to request they finish tightening the nuts with a torque wrench or calibrated air socket. Most good shops have the later and if used they make over-tightening pretty hard to do.

IMO if the lug nuts have been tightened that tight you might seriously consider replacing the bolts. Over time the bolts corrode and stretch and fatigue. It is entirely possible for fatigued bolts to snap if you hit a bump.

Fortunately in all the vehicles I know about the replacement bolts are just a couple of bucks a pop and are easy to replace.