I remember similar (and the "famous red dice", which once turned up, in 5 rolls, boxcars 4 times and one 11). I dunno. I like dice, but (say) in a system with strong effects for throwing natural 1s and 20s on d20, I do want them to come up 5% of the time.
You say "I'm perfectly happy if they're only 95% random" but... they could be a lot worse than that and we'd never know.
You say "I'm perfectly happy if they're only 95% random" but... they could be a lot worse than that and we'd never know.