Besides - all this speculation that the wings are upside down is just that..
Two of the pictures posted here earlier (don´t find them at the moment) show the rear spar of the right wing with the side stay still attached to its fitting, at the upper end of of the spar. At least the right wing for sure is upside down.
if the wings are resting upside down, then they must have rotated in a barrel roll
If they would have done a barrel roll after initial impact, they would look far more desintegrated.