Drat! After hearing the DM (Dice Master) explain it I'm now spoiled for anything but manufactured dice. If the edges won't cut skin every time I pick them up to roll they won't do! If the points don't leave little dents in the felt when I roll them they aren't sharp enough! If I can't build a tower 10,000 dice tall without them falling over they aren't precise enough!
Seriously though, I wonder if he ever Chi-square tested any of those supposed un-random rollers? I recall testing some of my dice through a large sample decades ago. The cheap, well worn, "lucky" dice I used for years from my first D&D game. They came out remarkably random. Proved to me "lucky" was a case of selective recall as I had always expected. And they were worn and rounder than my better quality dice of the same era (Gamescience solid white d20 with the casting spur more carefully shaved

) not because of the quality of the plastic but because they got used more. They just "felt" better somehow, and the cheap gems I kept buying looked cooler. That old solid white Gamescience d20 I splurged on (I think some friends thought I was crazy spending that much for it, I could have bought a full set of coloured dice for the same price) still looks brand new, because it's always the last one (as in almost never) used.
Sure casinos require a seriously strict level of quality, but it's not so much so they roll purely random as so they can catch cheaters

Of course they do want the rolls to be random, they make money on the fact they can predict the outcome of averages. I really don't think an RPG needs that level of quality.
He is a great salesman, of that there is no doubt, and he has quality products, but the whole rounded dice bit sounds like a lot of hype
