I think what Silicon is trying to say is that yes, the card that was designed from the ground up to be power efficient is power efficient, however considering that is the main goal, it makes the achievement somewhat less impressive? AKA. either company could make a card that efficient if they wanted to. You don't get FPS/$, you get FPS/W... while AMD is arguably more focused on FPS/$
So, a 50% improvement over the competition is "less impressive"?
And the last part: Lol.
So AMD is not trying to develop a GPU which they can sell in the notebook market because they want to sell cards which need twice the power?
Woha.