Status of Xbox HD DVD addon   People continue to remove the sentence However console addons of this type are traditionally and notoriously relatively unsuccessful due to poor sales saying that the addon is selling well I contend that when put into perspective it is not selling well not selling poorly just not well With  million Xboxs sold  and more than  addons sold the attach rate is quite small for something that is supposedly selling well The maths Ill use  to be generous        With prerelease claims from Microsoft that they would achive a  attach rate the current figures are less than good Hense I will be reverting the deletion of the sentence