Lonnie knows his $hit, that is for sure. Also being a former Certified Electrician, he said what some people mentioned above is incorrect about the neutral/ground bars. It is national code that the neutral and grounds go to the same bar and ultimately route to the ground outside. It is up to the electrician's style as to if they like to have a "clean look" and put the grounds on one side and the neutrals on the other. The strap at the bottom brings them togethor, so there is no difference, it is just a matter of installation preference.
Anyway, I'm not going to worry about it anymore, just ENJOY the tunes.
