Because I am very sure that this is simply wrong. The two PlayStations started to break even, and make profits, much sooner than two years AFAIK.
Well you can feel free to look for old articles confirming this, I'm not going to bother. I've seen articles in the past that showed Playstation 1 and playstation 2 were still sold at a loss wihtin the first two years they were on the market.
The common practise is to sell your hardware at a loss for the first while - then break even, and then making a profit on each unit sold.
That's correct, but you need to reach critical mass before that happens. In some cases it will take longer, and you can still plan for that. MS has already planned to not break even until year 4 or 5...