There is a new field being created here, and I am not referring to LENR. It is Scientific/Business Scepticism. I hate that word because whenever it is used the atheists take over the [lexicon]conversation[/lexicon]. This field has nothing whatsoever to do with religion. It involves R&D new inventions and claims vs counter claims.
There are many factors in place here. Not the least of which is government approval. Recently Rossi has mentioned something about electromagnetic waves. Any device that produces any kind of ray or wave requires FDA approval.
Think of it this way. Before you build a house you go to regional planning and building and safety and get a permit. The FDA government approval process works in the backwards opposite direction. A device better be completely done and ready with instructions and all or it will be rejected. Only then can it go through the permit process. Think of it like this. The house has to be complete. Doors locks drywall outlets etc. It has to have a kitchen. The bathroom fixtures must work. Hot water heater. HVAC. Ready to move in. Only then you can apply for a building permit and ask the county if you can please build the house in the location you want. Kind of dumb isn't it? Well that's the way it works. Now think of the implications if the county says no or if the county requires corrections. Put yourself in the shoes of an inventor. If you come out and tell the world what you have you still need to go through the process. The process is lengthy. If your device gets approval yahoo yippie! If it does not you are in a pickle because you already told everybody what's inside. Your competitors have access to the info and are busy copying your machine. You are busy making the corrections that the government asked for. You just gave everyone around you a head start and at the same time delayed yourself.
In this context it is best not to reveal anything about the device unless and until you get the piece of paper from the government with their blessing. If the holdup for Rossi's machine is the government approval and waves or rays produced by the device then this would explain why he would bet against it. The device might work but it will be worthless because you can't sell it on the open market.
Personally I think this technology is too important to jerk around with. If it is real the progress that could have been made if 1000 labs and scientists around the world were working on it has been wasted because only 1 shop and 1 scientist (self schooled) is sitting on it trying to perfect it now.
By the way before some smart genius says something to the effect of "just line it with lead or a shield of some sort" that remedy is covered in the FDA instruction manuals. They explicitly state that lead or shielding cannot be used to mitigate any effects of the machine. So save the lead lining advice.