If you want an eye opener check out the pressure gauge in your local tire shop, esp. if they do truck tires. The shop I USED to use in Corpus set their compressor to 175psi. Works great for busting semi lug nuts but not too well when thightening mini van wheel nuts. Took me an oxy torch, cold chisel, large hammer, breaker bar and socket to finally get these buggers off. In my 62 years I have only ever seem one shop that used a torque wrench when installing tires.

Before you get tries installed check the shop's air compressor's gauge. Chances are that it is set waaaay to high.