A peg is meaningless if you do not consider volume:
You can have $1.00 pegged to 1 BitUSD *or* You can have $100,000 pegged to 100,000 BitUSD but you cannot do both at the same time.
My argument is that we should prefer to peg $100,000 to 100,000 BitUSD rather than pegging $1.00 to 1 BitUSD because large merchants and people that wish to trade in large quantities of BitUSD need to know that they can accept it at face value.
Think of it as the difference in premium between 1 oz units of gold and and a gold bar with 400 oz of gold.
So long as the discussion is clouded with illusions that you can peg ALL volumes at the same price we will continue to talk in circles.