einhrvr,
After the calcs guys did earlier on the tail's horizontal velocity based on a 4sec/rotation ballpark, I too would wonder about having/not having evidence of sideways movement on the fin at impact. That's why I've been backing away from a standard spin or a flat-spin with high rotation rate.
One thing the 'failed slightly forward' represents to me was either slightly nose-down and/or with a slight forward horizontal travel at impact.
These seem to conflict with a flat-spin for an A330s as far as I know(I HAVE seen A330s fly over in the middle of the night going between Cancun and Vancouver BC
).
Edit: One thing the 'slightly twisted to the left' represents to me was some form of rotation, I'll admit a spin isn't the only way for that to happen.
If it were a low-altitude stall, it would really need to kill forward travel. Can be done. Not my favorite scenario.