Note that some developers find a way to cheat on animations.  I think the team behind the soul calibur series use two bones in the breasts to control movement.  Those hairs might be bones plus a smooth/bend feature.  A lot of animations are also pre-determined as much as possible.

They also have engines customized to do these sorts of thing well in real time.  Poser isn't tweaked for real time.

WARK!

Thus Spoketh Winterclaw: a blog about a Winterclaw who speaks from time to time.

 

(using Poser Pro 2014 SR3, on 64 bit Win 7, poser units are inches.)