"going to show rubbing wear as a result of friction occuring inside the slab which will diminsh the assigned grade significantly"

Agree entirely. The amusing thing here, as Gene pointed out at the time, was that the grader of his 'sample' had somehow missed the big black mark and rim nick in his assessment.

"I can't believe that chip collectors fall for these slabbing gimmicks"
Do your homework. Look on ebay. The people that have bought slabbed chips are chip collectors.