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Just about 90,000 miles on my STI with no anti-seize used on the lugs. Not a single one has broken. I use a torque wrench to tighten and a breaker bar to remove. Impact wrenches should only be used to remove stuff. Never tighten down using an impact unless you want to stretch bolts, strip threads, and otherwise destroy stuff.
I'll never take my STI back to a wheel and brake shop because they over-tightened my caliper bolts. When I went to do my brake upgrade several bolts snapped off, two pulled the threads out of the caliper (had to helicoil).
If you haven't done every single wheel change yourself, I'd raise an eyebrow toward your wheel shop. They're notorious for using impacts to take wheels off and quickly zip them back on without bothering to check torque.
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