Hmm, just noticed this news has spread to eurogamer and gamesindustry. If this isn't the kind of public news Microsoft wanted to hear, they should have solved this many months ago.
EDIT:
From Eurogamer:
Id be a dubious that a company that trys to sell extended warranty's comes up with damming figures. I mean, its not as if they will be selling warranty plans if the xbox isnt failing is it

(Im not saying the Xbox isnt unreliable im just saying i'd take figures from a company that sells warranty plans with a pinch of salt)