Also, the Surrounded boxset was DualDisc because the DVD-side had her music videos as well as the albums. I think that's why there wasn't enough space for a DVD-A track. I doubt music videos will be included (I doubt they've been made yet), so my guess is that the DVD will have a DVD-A track (especially since it's a DVD + CD package). It only makes sense...
Edit: So I checked Wikipedia, and according to them, it says the DVD will have a DTS track
but doesn't say whether it'll have DVD-A.These guys
seem quite sure that it'll be on DVD-A, but I haven't confirmed it with any other source.
This is frustrating. I didn't realize any the album would be coming out so soon. If I could get confirmation that it's a DVD-A, I'm ready to pre-order. I emailed One Little Indian, hopefully they'll get back to me soon. I'll keep everyone updated.