Isn't Mersenne-Twister much better than noise-based RNG, though? Albeit, I guess, that doesn't really matter for pseudorandom numbers used in games (I assume they still are pseudorandom and not fully random).Mersenne Twister.
Though Imperator is using a noise-based RNG instead. Don't think we backported that to any of the current games, but I might be wrong.
That RNG is a bit more performant than the MT, though random number generation has never AFAIK been a bottleneck in any of our games.
It also has some nice properties when it comes to seeding and such, but I can't remember the details off of the top of my head.