Is that Intamin? The track looks very very similar to SW6...
Yes, Tornado is Intamin, and yes the track is identical to sw6.
With reference to counterweights - I'm someone that has said from the moment the hole appeared that the cars won't drop below ground level, and the hole is for machinery. But I don't think we'll see counterweights for the simple reason that the track will be dropping, so a counterweight would need to be lifted in order for the track to drop and would only be useful if it's a slow drop, or to reset the track after the drop has happened.
It would help if the drop was going to bounce, but this is where I agree that it's not 1978 as nowdays we have things like air-powered drop rides which are more effective.
Re splitting trains... come on guys, think about this before you continue discussing it. The track won't support a splitting train, and if cars are going to drop individually surely there's no reason to send them round the track joined together - that makes for complex mechanics that could lead to an unreliable ride, and AT won't want a ride that needs really high maintenance or one that breaks frequently.