With the 580 launch it kinda shows how they under reported actual TDP with the 400 series, just noticed these cards are now rated at 185w instead of the original 150, actual power draw is over 200w:
https://www.youtube.com/watch?v=JAbW5yMzlbM
Once you take the 1060's 120w TDP into consideration and how it is on average the slightly faster card, you will see how far ahead nvidia really is. If AMD came out with a card that had similar power draw characteristics as the 1060, it would be a much much slower card.