(Sort of a repost of the same info from another thread...) Nightly Business Report . Toyota Prius tops monthly auto sales in Japan | PBS
The Insight's rule at the top of the heap didn't last long, one month. Honda should cut their price (to put pressure on Prius)...
Toyota sold 10,915 units in two weeks, becoming #1! Green Car Congress: Prius Top Selling Car in Japan in May
No need as long as both have enough demand to get an acceptable return on investment. Like the old joke about the man complaining about losing money on every deal. When asked how he stayed in business, he answered "volume." That pretty well describes the GM model and it worked so well for them. Bob Wilson