This pops up once in a blue moon in the polls forum, I think I started the last topic...
It depends what your definition of an inversion is...
Now i've ridden it, I can 100% say that I regard it as an inversion, purely for the fact that the hangtime is INSANE.
I think if a 'normal' coaster had an element like this, it would be considered an inversion. IMO, there are two reasons people disregard this as an inversion:
1) It was changed from a very similar element that clearly ISN'T an inversion (the vertical twist)
2) It's an Impulse coaster, and an inversion on an impulse prior to this was unheard of, so people just got the idea in their head that it isn't one.
Long winded, but that's what I think!