The Amarr violin stuff starts at 25 second. One louder chord, and then it's just very faint in the background. At 50 secs another louder chord and the "march" rhythm becomes a bit louder, too.
...and I consider myself half-deaf compared to what I used to hear in high school. (The bell or glockenspiel starting at 1:00 on the Amarr theme does take some effort to hear for me - so perhaps I'm just losing high-pitched sounds.)
The Caldari theme reminds me of one of the mission music pieces (Caldari Rock? Can't remember the name any more.)
Gallente: In style a bit like Nouvelle Rouvenor Hero without the "adventure movie" beat? Can't remember many of the songs any more, have to start playing EVE with music on.
Minmatar: Completely new sound. It appears that the Amarr were right: The Minmatar communicate by drumming. (Personally, I would not have minded if CCP would go thru with the "Brutor are Maori-influenced" idea and introduced New Eden to something haka-inspired, instead.)
General notes: Seem to fit EVE quite well. A bit more "action" and epic sound than in some of the even more ambient pieces. Need to have a few listens when not very tired to have a good idea.