I think you're missing the point Midcow. The issue is not a difference in metrics, signal transmission and/or resistance/impedance but build quality. Tougher rugged cables with good connectors and put together well by competent hands will last a heck of a lot longer than those cheap-o cables. I've had those cheap things fail on me within weeks before, even without any tugging/pulling/bending.
EDIT: Ah, I just read your very last post before this one, I skipped past it a little too quickly in my haste to reply. It sounds like we're all on the same page now.