Ok.... am I the only person that isn't impressed by the Sparkle vocals because they don't sound totally live?

It definitely sounds (and looks) like at least a strong backing track to me. The quality of the vocals and the sound itself is totally different in that clip than it is in any other clip that they aired. I'm sorry, but that's just the way that I see it. :runs and hides.
Other than that, I'd say that everything else that they showed was definitely live except for maybe that part of evolution for the woah yeahs, but she's been doing it that way for a long time now. Hopefully I end up being pleasantly surprised by the tour when it airs in November.