Just about to board my plane to the Frankfurt show and couldn't help but notice the post as I browsed the net. I'm answering because I had the same quesion for Axiom some time ago. The term "hybrid" doesn't actually refer to the material construction, instead, what they are talking about is the voice coil size. Normally, a 1" tweeter has a 1" voice coil. Their "hybrid" has a .5" voice coil. This was actually addressed in the Home Theater & Sound Epic System review by Vince Hanada.
Hope this helps.