That's the current plan. Who says they're not going to do a fivefold in hashingcapacity just before they're ready for shipping?
LOL...the chips are the chips. They consume the power they consume. MOST people are not going to have the available power for an increase in hashrate. In fact, the larger Viper won't even be able to run in most American homes, I think. Not without a mess of extension cords.