How on earth does Autozone hire someone like this to manage their store?

[XcYZ]

A 6" or 6' conductor makes no difference.

Look, I'm not trying to be an ass here, but I'm an Electronic Tech and I've been dealing with this stuff on a daily basis for nearly 20 years. I call complete BS on this unless someone can explain specific ground path ampacity deficiencies on the car/application in question. I'm not talking about adding amplifiers and HID headlights and such, I mean the engine performance side of it and how they "claim" they picked up 3-5hp on a chassis dyno. I'm not buying their story.