Dunno Whirly, probably about CPL level?
Seriously, the concept has primary benefit in annoying chauvanists, and no doubt with a bit of modification, many other 'ists who sorely deserve winding up.
A nice variation, which I've used once or twice, is to explain carefully to a Southern US racist that blacks are genetically superior to US whites since slaves were specifically selected for their strength and intelligence and American whites were the dregs of European society who couldn't cope so ran away. By which argument, the US, and particularly the former slave states, should logically be run by the blacks who will almost certainly do a far better job of it.
Very little credibility to either argument most times, but as an excuse to wind-up biggots, worth having.
Genghis
Male, white, happy to wind up anybody who thinks this is important.