This in itself is remarkable as other ASIC companies such as Butterfly Labs have continued to struggle to bring their products to market on time.
Moreover, the announcement made by co-founders Sam Cole and Marcus Erlandsson on YouTube (see below) has also confirmed that the performance of their chip set has far exceeded their initial promise to customers.
The original expected output of their chips was proposed at 250GH/s. This itself was a very impressive promise for a start-up company. However, based on their shipping silicon it appears that the actual performance is over 550GH/s.