I too think I might have a form of S.A.D. Olympia (though I am not diagnosed) My Depression gets worse and I notice a significant change in my mood and body functions in how I am with the late autumn/winter season VS spring and summer.
I don't see how Hibernation is like S.A.D. Hibernation does not contribute to emotional maladies and S.A.D. does not cause your body temperature to lower enough for you to go into torpor.
The above you wrote Chocolate, does not say that Hibernation is the same thing and doesn't even say that S.A.D. is a form of it. It is actually explaining how S.A.D. MAY have evolved from hibernation. Doesn't even say it is true only that they are guessing about it.
That is how I read the above.
1 Doberman Mix: Emmy, 2 DSH Cats: Rowan & Jacob, 1 Bearded Dragon: Rainier (aka Mista Lizad Man), 1 Eastern Box Turtle: Greta, Two 5g tanks: Alchemy (Halfmoon) and Custard (Yellow VT)