The KYB over 2.5" lowering automatically blowing out is indeed exaggerated. But we have had several members here post about blowing their AGXs with a lot of lowering.
The thing that really causes the problem, like I said, is the spring rates. Usually the AGXs blow out with springs like H&R Race or with skunk2 coilovers because they both have spring rates around 500 lb/in.