I think the chances of survival from genuine terminal velocity of a falling human (about 100kt) are zero, unless one lands in a pile of hay or similar.
The chance of survival with a missing wing is close to zero from the accident stats but isn't quite zero. I agree the descent rate could well be 10,000ft/min (100kt VS) which will certainly kill you but there is the possibility of the airframe absorbing some of the energy if it happens to hit the "right" way. Especially over a forest.
I would stay in, switch to the fuel tank that is still present, and see if there is any control left whatsoever. I doubt there would be...