I have to ask though, do you keep them in your bedroom or what? I've got 15 of them and it's not like you can hear them trough walls and closed doors, or maybe I've gone deaf from all the beeping when setting them up!

You are spot on on the performance issues however, I'm not done with testing my units since I received the last 5 today but it looks like 3-4 out of 15 in total have trouble with stock speed, then again it's more than compensated by a few of the units managing 450gh+, seems Bitmain should have maybe clocked them slightly lower to ensure a larger % could handle stock, even S1 had the odd lemon that had problem with 180GH/s but they were few and far between.