??? LOL... Please specify exactly which part of my statement was misleading, unrealistic or incorrect. I repeatedly stressed it was the 'US Average' you appear to be alone in taking exception to this. Would you have preferred 3-7 full hours of sun? Would that have met your high standards?
No backpedaling or assumptions... the US receives ~4.5 full hours of sun per day on average... that's just a fact.
Here's some real world data from a 11kW system I recently installed... I look forward to your retort that this isn't 'Average'.... LOL
OR better yet... How would YOU explain the viability of solar to the AVERAGE person living in the US.