[hbn]

Motion capture in bigger budget games only started to become common around the Xbox 360/PS3 generation. Go back to prior generations and it was a lot of "2 models facing each other and their mouths wiggle up and down while audio files play"

Pretty much exactly what you see in that video.

[swiftcoder]

The difference being that someone actually had to record said audiofiles, and animate the mouths wiggling. The "slop"-ness is defined by the inputs, not the outputs.