I am not sure how you can know this for sure. There are a number of Asian switching converter companies that do not appear on Digikey/Mouser/etc. They often do deals directly with manufacturers rather then distributors and they often make devices optimised for one particular job.
In the case of the Batteriser it's in fact the exact opposite of "one particular job", because you don't know what load this converter will be used on. The specs for this converter need to be the hardest technically possible. i.e. absolute minimal loss over the entire output operating current range in a ridiculously tiny space.
The way Seiko achieved a wide range of efficiency was to use pulse width modulation for about 10% to 100% power and pulse frequency modulation below that. They were able to get about 90% plus efficiency from 0.1% load to 100% load, and 75% at 0.01% load.
The space though is a big problem. You need a high frequency (say 1.5MHz) to get a tiny inductor that can still carry several amps, but going for high currents means high gate capacitance on the mosfet switches, and so you get increased switching losses. Basically, every time you double the peak output current, the gate capacitance increases by a factor of 4 or more. High gate capacitance and high frequencies don't mix.
I cannot see a chip that can deliver 1A at 1.5V out at 0.7v in as being in any way technically impossible, but I think most manufacturers would just say why bother? - if you are draining 2A plus from a flat battery to provide 1A out, the battery voltage is going to drop like a stone.
Which is why they will never ever release a characteristic graph for it.
Doesn't matter though, once someone with any clue gets one, it's a few hours work.
This is the juggling act Batteroo has. There is no way that these first products are within the Indiegogo budget (they did say that manufacturing turned out to be more difficult then an iPhone), and the VC investors don't care about Indiegogo - they only care about landing deals with supermarkets, or finding a big company that wants to buy the design for $100 million or more. They might even currently be using the initial samples of an IC repackaged by a manufacturer to fit their design, but cannot afford a production run from the IC manufacturer without a big deal signed. If Batteroo is doing the potting by hand in the US, it could explain why the devices couldn't be distributed from China.
Batteries are used in so many different ways. It means there would be so many tests you could do on the Batteriser that it would be a total miracle if you didn't find some big problems even if the designers did a good job.