If it's under a hundred watts and I can actually buy one, and it's actually 5 GH/s, that would all be enough for me.
Who cares if its 5 watts or 50 watts? It's a best guess while you're developing something.
If the top tier product was a 50 GH/s rig, then yes no one would really care. Let's assume the 5 GH/s unit consumed 100 watts. Then when you scale up to 50 (assuming something linear) you can target 1 KW which is on par with a quad-crossfire 7970 rig. You've beat the competition watt for watt dramatically. Everyone is happy and the world moves on.
But when you talk about a terahash. If your 5 Gh/s unit runs at 5 watts, then scaling makes sense. It's still very hot and very hard to cool, but it at least makes sense. In the 40-50 watt range, it doesn't to me and several other members here. More power = more heat.
Also when they were claiming the 5 watt range that meant you could run the unit off of a usb only. Put the unit in a small, very portable case, use a small fan if any at all, and finally long term persistent use is less likely to destroy the unit. Less heat, longer lifespan.
I actually agree with you about the 5 GH/s system which is why I ordered one in the first place. I could care less about the power consumption. My 7950 consumes a heck of alot more. But it just bothers me deeply they claim to be able to deliver something like a 1500 GH/s rig within any reasonable timeframe. I can't understand how they can justify that claim. Look at Intel with prescott
http://www.theinquirer.net/inquirer/news/1036882/is-intel-prescott-p4-hot-handleThey had units in a lab running at 8 GHz with liquid nitrogen cooling
http://www.geek.com/chips/is-intel-planning-to-clock-pentium-4s-to-8ghz-547912/. It eventually became clear that the roadmap didn't make any sense. They had to bite a very bitter bullet and let AMD trash them while they retooled.
I see it as a small company that hasn't learned throwing everything at the wall and seeing what sticks isn't a good business strategy. Be good to your consumers and treat them like family. Be honest and open. Admit the mistakes you've made and when you over-promise understand that it comes with a cost.