As far as I know, yeah. They use models provided by Valve along with catchphrases, arrange and control it in the way they want, record it, shbam~
...also, is anybody interested in this possible 10th class in the new homicide secretary from 'Expiration Date'? Not just for a gender equality in that game, availability for new weapon types...but possibly some new cosmetics, if you catch me drift...;P\
Also also, the Pan is the mightiest melee in the game, am I right? *raises flame shield*