It's (to me) more plausible that they are just incompetent and lack the manpower/skills to produce more units at a faster pace. Again, just my opinion.
Really, once they had the designs ready, why didn't they have the units built in China instead of making themselves? It's like Apple making iPhones themselves, by the time the iPhone 5 was announced they'd still be working on the backlog of iPhone 4 orders.
Maybe because they didn't want the chinese to steal the technology. The stuff that makes up an iphone is largely off the shelf. To the degree there are any really high end proprietary components inside I bet they are not manufactured by just any random cheap chinese contract manufacturer...
Chinese have the one of the worst track records in the world for stealing technology and IP
The chip design itselves is the most important technology and is produced in china. And whou would steal 55nm consuming over 4W/GHs design? Pretty bad design, considering on market are 28nm consuming under 1W/GHs