MT is pretty much concurrent with the first few books, yes. And confusing as hell because they refer to everything you know with different terms and they don't even know what houses and warrens are. (but the raw power of holds is so.. sooo awesome)
And in that vein. I'm thinking now that Cedance = Ascendancy, but with Holds? Explains why the Ceda was so fuckin badass. Dunno, it was just something Hannan Mosarg was saying to another character.
Actually, I'm still confused about something from Bonehunters..