I don't think the sales in NA have been hurt too much, however I for one will not get an xbox 360 until RRoD is permanently fixed, despite wanting some of the exclusive titles.
In Europe and Japan I do think it's hurt them quite a bit.
Most likely, if it hadn't been for that, they likely would have been able to hold onto 2nd for this generation, or at least an extremely close 3rd. As it is, the PS3 will ultimately pass them based on much stronger Japan and Other sales.







