A large manufacturer mining / "burn testing" for 2 weeks does drive up the difficulty, which makes the unit less profitable. There won't be much problems if you did "burn testing" on testnet but of course nobody will do burn testing if it's on testnet.
The picture of their burn testing rack looks like it might handle a hundreds Jalapenos or a couple of dozen Singles. I don't think that's going to change the world.
Not to mention they're just doing burn-ins for 24 hours on each unit anyway.
Let me get this straight! Are you telling me that once those 300 units are made during the day, they're put on racks to be burned in for 24 hours prior to being boxed up, then shipped out?
What the fuck am I missing here?
I can't image the space this would take up that BFL doesn't have, let alone the amount of energy it'll take to simply fire up them miners. BTW, how many can be attached to a single computer at one time? Surely, we're not talkin' 'bout 300 PCs are we?