Yes, and look two paragraphs below that:
"(According to another discussion starting in January of 2011 titled Rocker Panel Color, the idea has been presented that the rockers were, in fact, a dark grey, and not black. Also, they seem to be more of a semi-gloss than a flat finish. Original cars, with an original owner in one case, give good evidence that the rockers are dark grey. Additionally, there is evidence that there was paint brushed on the light colored screw heads to camouflage them.)"
You must realize that just because it is written in the tech manual that does not make it fact.
I mean no disrespect, simply the tech manual was written by mortal men like you and me.
Mark