No way the story jumps a couple months no matter what is happening. You have too much going on and in ch 2 Tavi even said they had only 8-10 months before all the survivors were wiped out. Its too much to take care of in too short a timespan for them to jump ahead. Not to mention the plots involving all the other characters.
We'll see. 10 months is the time before the last human survivors get wiped out, at the current rate. But Ehren's most optimistic estimates for delaying the Vord on the way to Riva was about 3 months. About the other characters, Ehren's job is going to be fairly dull, burning and salting the land, and Isana, Bernard and Amara seem to be holing up in Calderon.
What I find interesting is that we haven't had direct word of Bernard and Amara yet, and what kind of plans they are laying out in Calderon, or why Bernard asked Isana to come there. Whatever that is, it will probably come out only towards the end of the book, as the Vord have to get through Riva and to Calderon first.
Calderon makes for a nice battlefield for the final engagement though, don't you think. A nice steep valley with a heavily fortified position on it's eastern end, mountains all around, an isthmus to the west where an incoming force could prevent a retreat, a sea of ice (icemen!) to the North, Marat tribes to the east, and a couple of big, bad-ass local furies as a wildcard. Furies that just happen to be furies of Earth and Air, much like a certain Count and Countess of our acquaintance.
The stage is set, now let Jim bring on the drama.
Ididit: OK.. so 100 pages is for the total of the sample chapters. I didn't realize we'd read through that much already. Well that's still 600 yummy pages to go.