That's true, for the most part. The caliper bolts (not the caliper bracket bolts) I've done had thread locker on them. I always use thread locker on them when installing, on any vehicle. Once R/R'd, they aren't as bad. The first removal after many years since new are a real bear. The OEM thread locker is much more difficult to break lose than blue Loc-Tite.

The brackets are another story. I have yet to see one I was able to get loose with a 1/2" impact wrench (different wrenches, high pressure, didn't matter). My first experience was on mine. Ultimately, I had to lower the truck with the wrench on the ground to get them loose (was out of town during a hub job, and didn't have a long enough cheater on hand). Others I've done weren't as bad, but close. The rears aren't as bad as the front, but not far off.