What's a "tris"?
Also, as this game uses the id4 Tech Engine, it could use megatextures (http://en.wikipedia.org/wiki/Id_Tech_4#MegaTexture_rendering_technology).
Models whether they be character, vehicle, weapon or whatever are made up of polygons. Splitting a polygon in two gives you a triangle (or tri). Most game engines read objects as triangle shapes, hence the shortened tri.
For example, in World of Warcraft the average tri count of the characters are Approximately 2000. This low number allows for many people to be on the screen at once, which also means that to keep the visual appeal up, the textures used were hand painted. In contrast a game like UT3 which has fewer people (hence less work for the engine to manage, has counts running in the 6k range. Crysis engine can manage alot more. here we get up to 25k.
And if you guys are not to bored with this, Shrek used upwards of 300k in the face alone to make the most of facial expressions.
It's very tough to judge sometimes what a studio is putting out with the added benefit of a high poly sculpting tool like zbrush which can sculpted millions of polygons and then be baked down onto a 6k figure. My guess is these characters are in the 8-10k range, but I'd like to know anyway what the specs are. The 3d community tends to do a lot of fan based projects/mods on games, but they generally require a base to start with.
Which is why TF2 has such a following.