I’ve be suprised if they had 5,000 tris on a current gen console version, more probably to have that on a PC version, although if there weren’t many characters on screen at once, you could probably get away with it.
Best way to find the tri count of characters in a game is to ask someone who’s worked on a game ;)
Doubt you’ll find that info anywhere else, unless you can import characters into games and find some of those characters to load into maya/max. Think you could do with with some FPS and WoW ?