With a minute spot, I would suggest getting a couple of different people to read different spots.  You could have somebody doing mythbusting spots but I think it would be better to instead focus on the really cool features built into next and helping people imagine the reasons why they would actually want to use it.  People are very creative once you point them in the right direction, but the metacoin layer thing is a tough sell at first.     If you focus on the negative stuff people think about NXT, you come off as defensive but if you just talk about why your project is neat and why you're excited about it, that will attract more attention because people think its a good thing not a bad thing.

The perspective YOU bring, going into talk to people about NXT will be reflected in how they react.  If you think they'll hate it, they're probably going to hate it because you'll couch your words in such a way to make them prepare to hate it.  

You guys don't need to be defensive, you have a major advantage - a product that's out, and that seems to work with a development team that doens't have the legal liability of your competitors or some of the jurisdictional risk.   Your disadvantage is NXT appears to be a bit headless, with a few self-appointed organizers but no real structure besides stakeholders acting in what they feel is their own best interest.   It might be interesting talking about that, how NXT is a *real* decentralized org in that there is no formal company at all doing the development or paying for anything.