even if that was true it is retarded. so they are admitting they are creating imbalances!! not a smart idea. how are you supposed to get stronger when you restrict your waist size? ever see a powerlifter who squats heavy? they don't have skinny ass glutes, waist and quads for a reason.
I encourage people to lift raw. never use a belt, straps, gloves, or wraps when you lift UNLESS you have some sort of medical reason for doing that. that is how you cause imbalances.