Everybdy think in a small timeframe.
Every current xb owner is in a trap:they spen money for the system and for the softwares,so they will re-buy and re-send many times the console to minimalise the loss that was made by the ms.
But many good game will be on the competitive system too,and within a few years the sony and the N will make an ms level network system.
So,the guy who will have to make a decision about the brand of the device (it mean right now many million early adopter geek) to buy in the coming decade will have a strong anchor:the not-reliability of the xb machine.
You know, if there is no fanboyism,the pure fact dictate the decision.
And the customer memory is very long about the quality issues.You can destroy a picture within 5 min,and you can spen a life to repair it.