Even Jeff and BTC Foundation may receive functioning Avalon, think twice before you order the 2nd batch:
南瓜这次发货的方法我很熟悉
我见过有人这么做，做出来的产品良品率低，就从矮子里面找高个的
拼凑出来几台最稳定的机器先拿出去
我和群里的也说过，我相信他发给JEFF的那个机器是工作的很完美的机器
一旦JEFF发了评测，后面的人哪怕拿到的是垃圾也只会认为自己比较倒霉
Translation:
I know the way how NGZ is shipping his product.
I knew someone shipped his product like this before: Since most of the products were defective, he picked the best ones and built a few stable machine for first round shipping.
I told other people in the channel: I believe he will send a perfect machine to Jeff. When Jeff has released his report, other customers will just think they are unlucky even they receive a crappy machine.
The hashing chips have yield problems (depending on the optimization of the density even 50% of chips can be bad). If You assemble a board with bad chips the whole board is bad (unless the board is designed for redundancy). On the other hand testing each chip separately is very expensive and time consuming (without special equipment that allows on wafer testing).
The only proof for the batch1 machines to be functional is a 50% increase of the hashing power.