I am anxiously waiting to purchase the 68U but all these issues AND the fact that no one has any stock left has me holding my powder. There must be a reason Asus has not re-stocked their suppliers. It may just be a cautious decision until the software bugs are worked out, but I now have my suspicions. I really don't want another Netgear.
Asus has always had supply issues whenever releasing a new popular router. It took months for the RT-N66U to become widely available for instance - some places had it in stock as early as in December 2011, but many places only got them in March. Took until April for Canadian retailers to have any in stock.
So, not necessarily because they are worried about quality, mostly more a supply issue.