Although Microsoft aren't admitting the actual figures, retailers and educated guessers suggest that 30% of Xbox 360 consoles are dying. This compares with the Playstation 3's official failure rate of less than 1%.
Does this deter prospective purchasers of the Xbox 360, especially now that Microsoft have belatedly offered a 3 year warranty? At the very least, it might make some people delay buying till they're sure Microsoft have got the problems sorted out.