Yes, it's only getting results from the people who buy warranties on their consoles; but what you're not explaining is how that creates a bias in the results. It's like only asking people who eat wheat bread what they think of the government(reworking your bad example); the actual behavior is irrelevant to the results.
Any time you select a group based on a behavior, you introduce bias into a study. Sometimes, that bias is as simple as selecting a group based on their willingness to
answer a poll. The range of bias can be subtle, obviously, but it exists nonetheless.
For example, people who only eat wheat bread are obviously more health-conscious than other people. More health-conscious implies a greater level of education. A greater level of education will yield a difference in any opinion poll.
In this instance, you're looking at people who are more willing to make an investment to secure the extended operation of their product. That would
tend to pre-select more for people who will actually do things like pay attention to the manual when it tells you how to properly set up the console, people who will keep it perhaps cleaner than someone else, etc.
Except for Wii consoles. Pretty sure that was all just random parents getting talked into it at Best Buy. FIVE TIMES THE SAMPLE SIZE.
This is mainly what I was driving at, that they had been tracking the failure rates for the different versions of the hardware and that they had been getting more and more stable; proving that the 54% number was completely wrong.
Will be completely wrong is the phrase you're actually looking for. Or possibly
is now. It's generally conceded by most people, I think, that the latest mark of the hardware (4th or 5th version, whatever it is) is pretty solid. But I don't think you can blame people for being leery of the console's
history.
Microsoft openly threw a
billion dollars at the problem, because they
knew that the original hardware was shite. I have to expect that they knew it was shite when they put it out originally, and did it anyway hoping that it wasn't as bad as they thought, just to steal a march on Sony.
The fact that the hardware is decent
now does not mean that it was not bad
then.