Well ASICMiner just gave mini rig buyers a punch in the gut.  

Buy from BFL in August 2012. 1 mini-rig 1.5 TH/s @ 3000 BTC
Buy from ASICMiner in August 2013.  20 Eruptor Blades 1.5 TH/s @ 420 BTC
So buy from ASICMiner a year later, no pre-order stress, product will ship in days, spend 86% less, get the same hashing power and receive it sooner.

Things move fast in the mining world so specs only matter if the company can deliver as advertised when advertised.  Those that trusted BFL @ 65nm paid the price, now they want to tell you 28nm will be different.