As someone who ordered back in August 2012 and received his 2 jalapenos a week ago I can say I'm still very happy with my order. I wouldn't advise someone to buy into it now as this article doesn't do enough to explain the geometric rise in difficulty will most likely make it difficult to recoup costs on the hardware by the time an order made today ships. BFL estimates they will clear the backlog of orders by September of this year, but their estimates are notoriously bad so take that with a grain of salt.
These units don't perform worse than what I originally ordered, in fact they hash at a rate that is 24% higher than what I ordered (5.6GH/s vs 4.5GHs). While it is true to say they use more power than promised as they were originally going to use 5 watts and instead use 30 watts saying they perform worse AND use more power is misleading.