Oh come on, people. You are cruel and unfair to poor BFL. It's not like they are not trying
But seriously, 600mhash/s how are they going to cool all that in such small blade? Will it be again "two more weeks and you have it in your hands, we swear! We just need to fix cooling/power issue it will take 3 more days and you'll have it in 2 weeks!"
If it only consumes 350W due to the new smaller technology, then it´s like a graphicsCard´s power throughput. Therewith theoretically possible. But remember what they´ve said about Jalapeno´s power consumption: originally 4,5W, later corrected to 30W. If same with this new blade, you will get something like 2kW... then there is a big problem. I won´t buy it, I´m still waiting for my Single. I don´t want to buy new hardware for mining endlessly.
I bet, short time before they deliver, they will announce the new "Empire Blade" with 5TH, Preorders now, customers of "Monarch Blade" can be switched by a fee of 15%. Alleged "Delivery late autumn 2014"...
One thing is clear: They are the real winners. I´m not against technical progression, but I´m also not it´s junky.